Journal of Physical Chemistry C
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2023
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IF 3.7
Hongxiang Wu,Yibo Wang,Zhaoping Shi,Dongchen Han,Jiahao Yang,Pengbo Wang,Jing Ni,Meiling Xiao,Changpeng Liu,Wei Xing
The successful deployment of proton-exchange membrane water electrolyzers (PEMWEs) relies on the development of an active and durable electrocatalyst for the anodic oxygen evolution reaction (OER). Although rutile IrO2 shows excellent durability due to its stable crystal structure, it suffers from unsatisfactory activity. Here, we report a partial Sn substitution strategy to trigger lattice oxygen reactivity toward boosted OER. The similar crystal structures of IrO2 and SnO2 promote uniform incorporation of Sn into the lattice of IrO2, thus retaining the durability of the pristine rutile phase. More importantly, the electron transfer from Ir to Sn through the local structure of Ir–O–Sn was found to enhance the Ir–O bond covalency, which in turn activated the lattice oxygen to participate in OER. The enhanced lattice oxygen mechanism (LOM) was further verified by in situ 18O isotope labeling in situ differential electrochemical mass spectroscopy (DEMS). Due to these attributes, the as-designed Ir0.83Sn0.17O2 catalyst showed significantly improved performance, with an overpotential of only 284 mV at a current density of 10 mA cm–2, 38 mV lower than that of the commercial IrO2. In addition, the mass activity of the Ir0.83Sn0.17O2 catalyst reaches as high as 130 A gIr–1 at 1.55 V, which is 2.58 times higher than that of commercial IrO2. Beyond that, the intrinsic stability of the rutile phase endows the Ir0.83Sn0.17O2 catalyst with excellent operational durability. This work provides a novel insight into the improvement of catalyst activity and inspires the design of highly active and stable OER catalysts.
研究领域:
材料科学
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电化学
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DOI
高影响因子
RSC Advances
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2018
·Vol. 8
·期 37
·20576-20584
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IF 2.936
Ningxian Hao,Yang Wei,Jialiang Wang,Zhiwei Wang,Zhaohua Zhu,Shulin Zhao,Min Han,Xiao Huang
Electrochemical and photoelectrochemical (PEC) oxygen evolution reactions (OER) are receiving considerable attention owing to their important roles in the overall water splitting reaction. In this contribution, ternary NiFeCo-layered double hydroxide (LDH) nanoplates were in situ hybridized with Ti3C2Tx (the MXene phase) via a simple solvothermal process during which Ti3C2Tx was partially oxidized to form anatase TiO2 nanoparticles. The obtained Ti3C2Tx/TiO2/NiFeCo-LDH composite (denoted as TTL) showed a superb OER performance as compared with pristine NiFeCo-LDH and comercial IrO2 catalyst, achieving a current density of 10 mA cm−2 at a potential of 1.55 V versus a reversible hydrogen electrode (vs. RHE) in 0.1 M KOH. Importantly, the composite was further deposited on a standard BiVO4 film to construct a TTL/BiVO4 photoanode which showed a significantly enhanced photocurrent density of 2.25 mA cm−2 at 1.23 V vs. RHE under 100 mW cm−2 illumination. The excellent PEC-OER performance can be attributed to the presence of TiO2 nanoparticles which broadened the light adsorption to improve the generation of electron/hole pairs, while the ternary LDH nanoplates were efficient hole scavengers and the metallic Ti3C2Tx nanosheets were effective shuttles for transporting electrons/ions. Our in situ synthetic method provides a facile way to prepare multi-component catalysts for effective water oxidation and solar energy conversion.
研究领域:
材料科学
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能源科学
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催化科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Jiao-Jiao Duan,Ru-Lan Zhang,Jiu-Ju Feng,Lu Zhang,Qian-Li Zhang,Ai-Jun Wang
Developing cost-effectiveness and superior electrocatalysts is crucial to improve the efficiency of oxygen evolution reaction (OER) in water splitting system. Hence, flower-like phosphorus doped Ni 3 S 2 /CoFe 2 O 4 arrays (P-Ni 3 S 2 /CoFe 2 O 4 /NF) were generated on three-dimensional (3D) nickel foam (NF) via the two-step hydrothermal treatment and subsequent phosphorization. Additionally, a series of control experiments were conducted to investigate the formation mechanism. By virtue of the unique 3D configurations and multi-compositions, the as-prepared catalyst exhibited greatly improved OER performance in 1.0 M KOH solution, with the overpotential of only 254 mV at 50 mA cm −2 and low Tafel slope of 54.43 mV dec −1 . This study provides a feasible approach for preparing advanced electrocatalyst in energy conversion and storage devices.
研究领域:
材料科学
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电催化
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能源转换与存储
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DOI
PubMed
高影响因子
Materials Today Energy
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2023
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IF 9.3
Shanfu Sun,Guopan Sun,Pengfei Cheng,Ruiqi Liu,Chunfu Zhang
‘Outstanding’ electrocatalysts towards oxygen evolution reaction (OER) are springing up at present, to the extent that one questions if most nanomaterials are inherently highly active electrocatalysts . The answer is negative for certain easy-to-ignore data processing errors could lead to potential misjudgment of electrocatalytic activity. Combing through 100 highly cited papers (ESI 1% in Web of Science) concerning OER published in the last three years, the applications of uncompensated potential ( iR s )-correction rates are severely inconsistent. Herein, taking the benchmarks RuO 2 and IrO 2 as model catalysts, the authors investigated the effects of various iR s -correction rates on OER performance (overpotential, Tafel slope, and turnover frequency). The unanticipated discoveries may provoke a re-examination of those reported as ‘great’ OER electrocatalysts as well as help draw attention to iR s -correction rates in the field of electrocatalysis .
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Dongxu Zhu,Guyu Liu,Guangjiang Zhang,Zihao Yin,Huan Yang,Shuai Gao,Chenhe Zhang,Xinguo Xi
Spinel-type transition metal oxide (AB 2 O 4 ) are promising non-precious metal catalysts for oxygen evolution reaction (OER), addressing the challenges of high cost and poor stability in electrocatalytic water splitting. However, their widespread application is hindered by low electrical conductivity and suboptimal performance. In this study, we developed an oxygen vacancy anchoring strategy to construct a highly efficient and durable NiCo 2 O 4 -NiSe 2 heterojunction catalyst on a nickel foam substrate. The three-dimensional cross-linked porous nanorod array facilitates mass and charge transportation. The abundant interconnected interfaces enhance electron transfer kinetics and adsorption of OH intermediates, as confirmed by theoretical simulations. As a result, the as-synthesized NiCo 2 O 4 @NiSe 2 /NF exhibits an overpotential of only 299 mV at a current density of 60 mA cm −2 , significantly outperforming the single-phase NiCo 2 O 4 and demonstrating exceptional durability.
研究领域:
材料科学
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电催化
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能源转换
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Yujie Xiang,Zhengting Wang,Ying Zhang,Rui Gao,Yonggui Tao,Chisheng Deng,Shukang Deng,Jinsong Wang,Kaiyuan Shen
The environmentally friendly and sustainable characteristics of hydrogen generation through water electrolysis have drawn considerable interest. However, the inherently retarded reaction dynamics of the oxygen evolution reaction (OER) limit its efficiency. Consequently, advancing high-performance and cost-effective OER electrocatalysts significantly strengthen the water electrolysis’ performance. A composite nanostructured catalyst is successfully developed by integrating S-doped NiMoO 4 with NiFe-layered double hydroxides (LDH). Characterization results indicate that the NiMoO 4 -decorated NiFe-LDH increases catalytic efficiency by providing additional active sites, while the introduced S further enhances electrical conductivity. Electrochemical tests reveal that the OER capability of S-NiMoO 4 @NiFe-LDH under alkaline conditions is exceptional, achieving a negligible overpotential of 256 mV at 50 mA cm −2 and a minimal Tafel slope of 27.8 mV dec −1 , along with outstanding durability at 10 mA cm −2 (200 h). Furthermore, electrochemical probe experiments and mechanistic analyses reveal the possible potential reaction route of the catalyst during the OER, playing a crucial role in clarifying how the adsorbate evolution mechanism (AEM) and the lattice oxygen mechanism (LOM) synergistically enhance catalytic performance. This study affords a compelling strategy for establishing stable and efficient catalysts for electrochemical water oxidation.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Ruixue Liu,Xinli Li,Zhendi Jia,Yiyun Wang,Yanli Peng,Congming Tang,Zhi Chen,Lin Dong
The hydrodeoxygenation of lactic acid (LA) to propionic acid (PA) is of great significance for the conversion of biomass to valuable products; however, it remains a great challenge because of the trade-off between LA conversion and PA selectivity. Here, we prepared ultrathin MoS2 nanosheets containing rich sulfur vacancies by lithium exfoliation. With the increase of the lithium exfoliation time, sulfur vacancy in MoS2 is accordingly increased and LA adsorption and activation on sulfur vacancy is enhanced. Increasing sulfur vacancy lowered the valence band simultaneously and enhanced the dissociation of the H2 molecule. Density functional theory (DFT) calculations showed that the sulfur vacancy efficiently adsorbed α-C–OH of the LA molecule, weakened the C–O bond, and achieved selective conversion of LA to PA. At 215 °C, 92.4% of LA conversion and 95.8% PA selectivity were achieved over the sulfur vacancy-rich MoS2 nanosheets, which broke the activity–selectivity trade-off on hydrodeoxygenation of LA, and notably surpassed those of previously reported catalysts. More importantly, the activity of the catalyst remained almost unchanged after 8 cycles of reaction.
研究领域:
催化化学
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生物质转化
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材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Li Wang,Junli Wang,Xuanbing Wang,Min Li,Jinlong Wei,Nianxiang Hu,Ruidong Xu,Linjing Yang
Low-cost and high-efficiency electrocatalysts produced by constructing the interfacial heterostructure have attracted more attention in oxygen evolution reaction (OER). Herein, we synthesize a three-dimensional (3D) heterogeneous structure of Ni x Co y Se 2 nanospheres loaded onto NiFe hydroxide (NiFe-LDH) nanosheets via bare nickel foam (NF) two-step electrodeposition. The optimal NiFe-LDH@Ni x Co y Se 2 /NF nanosheets heterojunction electrocatalyst is verified with an excellent OER performance in 1.0 M KOH solution, which only requires a low overpotential of 265.5 mV and 297.8 mV to drive high current density of 100 mA cm −2 and 500 mA cm −2 , respectively, long-term durability of more than 60 h at 100 mA cm −2 , and an extremely low Tafel slope of 57.5 mV dec −1 . Meanwhile, due to the dramatic improvement in OER performance, there is an enhancement in the overall water-splitting activity of the NiFe-LDH@Ni x Co y Se 2 /NF nanosheets heterojunction, attaining a current density of 20 mA cm −2 at the low cell voltage of 1.65 V. As a result, it shows the importance of constructing highly efficient OER catalyst with the rational design of heterostructures. The enhanced catalytic performance can be attributed to the large exposed electrocatalytic active sites accessible and constructed an efficient electronic transmission channel by eliminating contact resistance.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
LIFE SCIENCES
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2024
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IF 5.2
Xuehan Dou,Zhongyuan Chen,Yunzhang Liu,Yun Li,Junli Ye,Ling Lu
Aims Prolyl hydroxylase domain 2 (PHD2), encoded by the Egln1 gene, serves as a pivotal regulator of the hypoxia-inducible factor (HIF) pathway and acts as a cellular oxygen sensor. Somatic inactivation of Phd2 in mice results in polycythemia and congestive heart failure. However, due to the embryonic lethality of Phd2 deficiency, its role in development remains elusive. Here, we investigated the function of two egln1 paralogous genes, egln1a and egln1b , in zebrafish. Main methods The egln1 null zebrafish were generated using the CRISPR/Cas9 system. Quantitative real-time PCR assays and Western blot analysis were employed to detect the effect of egln1 deficiency on the hypoxia signaling pathway. The hypoxia response of egln1 mutant zebrafish were assessed by analyzing heart rate, gill agitation frequency, and blood flow velocity. Subsequently, o-dianisidine staining and in situ hybridization were used to investigate the role of egln1 in zebrafish hematopoietic function. Key findings Our data show that the loss of egln1a or egln1b individually has no visible effects on growth rate. However, the egln1a ; egln1b double mutant displayed significant growth retardation and elevated mortality at around 2.5 months old. Both egln1a - null and egln1b - null zebrafish embryo exhibited enhanced tolerance to hypoxia, systemic hypoxic response that include hif pathway activation, increased cardiac activity, and polycythemia. Significance Our research introduces zebrafish egln1 mutants as the first congenital embryonic viable systemic vertebrate animal model for PHD2, providing novel insights into hypoxic signaling and the progression of PHD2- associated disease.
研究领域:
发育生物学
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分子生物学
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遗传学
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DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
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2024
·Vol. 11
·期 20
·7176-7188
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IF 6.1
Zhanqiang Hu,Songsong Zhi,Chen Chen,Jiuli Chang,Dapeng Wu,Kai Jiang,Zhiyong Gao
The oxygen evolution reaction (OER) is the efficiency limiting half-reaction in water electrolysis for hydrogen production, which necessitates the use of an efficient and cost-effective catalyst. Nonmetal and metal element codoping is an effective way to profoundly modulate the electronic structure of transition metal oxide catalysts and the interaction with oxygen (O) adsorbates, which are crucial forOER efficiency. Herein, a sulfur (S), phosphorus (P) and iron (Fe) element codoped nickel oxide (NiO), denoted as S,P-NiO(Fe), was prepared as an OER catalyst, wherein the incorporation of P and Fe played significant roles in regulating the electronic structure of the NiO motif and reducing the activation barrier of the rate-determining step (RDS) during the OER process, thus substantially enhancing the catalytic capability. Concretely, the S,P-NiO(Fe) electrode displayed an overpotential of 230 mV at an OER response of 50 mA cm−2, a low Tafel slope of 64 mV dec−1 and robust catalytic stability. Theoretical calculations showed that the incorporation of P and Fe downshifted the d-band center position, which mediated the adsorptive interaction strengths of O-intermediates and reduced the activation barrier of the RDS (from *O to *OOH), whereupon the low energy pathway led to rapid OER kinetics. This work offers a viable tactic to improve the OER catalytic capability of metal oxides through metal and nonmetal element codoping.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Nanoscale
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2024
·Vol. 16
·期 47
·21947-21959
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IF 5.8
Feng Jiao,Jun Tang,Jinzhao Huang,Zehui Liu,Jing Xiao
Molybdenum sulfide (MoS2) has attracted much attention as a potential catalyst for the oxygen evolution reaction (OER), but its unique low activity and low edge active centers limit its electrocatalytic activity. In this study, catalysts were prepared by growing NiSe nanoclusters in situ onto MoS2 substrates via electrodeposition; ultrathin MoS2 nanosheets and NiSe nanoclusters were cross-linked with each other to form a unique three-dimensional rosette structure; and MoS2@NiSe catalysts were successfully synthesised, which significantly improved bifunctional catalytic performance. The synthesised MoS2@NiSe catalysts exhibited good electrochemical performance: overpotentials required to satisfy the HER and OER processes at a current density of 10 mA cm−2 in 1 M KOH were 80 mV and 254 mV, respectively. When applied as a cathode and anode to assemble a bifunctional electrode system, the MoS2@NiSe||MoS2@NiSe electrolytic cell system required only 1.54 V to achieve 10 mA cm−2 in an alkaline electrolyte, which exceeded the value of most of the bifunctional catalysts reported in the literature to date. In addition, the catalyst maintained good surface structure and catalytic performance after a 24 h stability test. This study provides a new idea for the improvement and design of MoS2-based bifunctional catalysts and provides an important reference for research in the field of clean energy.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 11
·2101-2107
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IF 4.59
Ying Wang,Ran Du,Jinjie Qian,Yue Hu
Graphical Standing tall : Herein, a type of hierarchically ultra-fine CoP attached onto nanostructured CuO nanowire flowers (CuO NWF-CoP/CF) has been conveniently obtained by electrodeposition method, which exhibits outstanding oxygen evolution reaction activity with a small overpotential of 230 mV to achieve a current density of 50 mA cm −2 in 1.0 M KOH together with a satisfying long-term stability. The facile fabrication of high-performance and low-cost photo-/electro-catalysts for oxygen evolution reaction (OER) still presents a tough challenge. Herein, a type of hierarchically ultra-fine CoP attached to CuO nanowire flowers (CuO NWF-CoP/CF) has been obtained by a simple electrodeposition method. Due to the merits of the 3D hierarchical structure with large surface areas, rich active sites, and open-channels for effective gas diffusion, as-achieved CuO NWF-CoP/CF catalysts exhibit outstanding OER activity with an overpotential of 230 mV for OER to achieve a current density of 50 mA cm −2 in alkaline media. This work provides a novel method to prepare hierarchical self-supported electrocatalyst towards efficient water splitting.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）