JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yuchun Ren,Jiayun Song,Shengjun Sun,Zixiao Li,Chaoxin Yang,Zhengwei Cai,Min Zhang,Meng Yue,Hefeng Wang,Dongdong Zheng,Yanqin Lv,Xuping Sun,Bo Tang
Seawater electrolysis, benefiting from the closeness to coastal areas, is recognized as a promising alternative for hydrogen (H 2 ) production to replace conventional technologies. However, the effectiveness of this method is limited by anode catalysts that exhibit high energy consumption and short lifespans due to chloride-induced chemical corrosion. Herein, we propose a hierarchical Ni phosphate@NiFe layered double hydroxide on Ni foam (NiPO x @NiFe LDH/NF) towards alkaline seawater oxidation (ASO). In terms of its unique hierarchical structure, NiPO x @NiFe LDH/NF delivers an industrial current density reaching up to 1 A cm −2 with 352 mV overpotential. Electrochemical experiments and in situ characterizations reveal that self-released PO 4 3− can act as a robust barrier for chloride ions adsorption through strong electrostatic repulsion, promoting unstable activity phase NiOOH drive at 1 A cm −2 for 600 h, farther than NiFe LDH/NF (75 h). Moreover, the honeycomb-like NiFe LDH shell facilitates the rapid and uniform release of O 2 bubbles, which enhances the mechanical stability of the electrode during long-term ASO. In general, this work offers valuable potential for designing an advanced anodic electrode with remarkable electrochemical performance and superior anti-corrosion for ASO.
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GREEN CHEMISTRY
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2024
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IF 9.3
Kaihua Liu,Xinzeng Zhang,Jing Li,Yuanyuan Liu,Meiri Wang,Hongtao Cui
Seawater electrolysis provides a desirable pathway for large-scale production of green hydrogen without dependence on freshwater. However, its practical application is seriously hindered by low energy efficiency and insufficient durability because of the detrimental chlorine electro-oxidation and complex components of seawater. Herein, 2D MoN/Co2N hybrid nanosheets grown on 1D Cu nanowires and integrated on 3D Cu foam electrodes (Co/Mo–N–C/Cu) were fabricated for seawater splitting, which could enable the alkaline seawater electrolyzer assembled with these hierarchically structural electrodes to achieve a current density of 100 mA cm−2 at a low voltage of 1.70 V, along with good stability due to the synergistic effect among the MoN/Co2N hybrid nanosheets, unique 1D/2D/3D hierarchical structure, and the N-doped carbon protection layer. Theoretical calculations demonstrated that strong electron transfer occurred at heterogeneous interfaces, which could mediate the adsorption and desorption of intermediates, thus reducing the reaction energy barriers.
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 24
·12513-12519
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IF 8.867
Jinxing Zhang,Weifeng Yao,Cunping Huang,Penghui Shi,Qunjie Xu
Research and development of high efficiency non-noble metal cocatalysts for solar photocatalytic hydrogen production have been aiming at a long-term goal of a renewable hydrogen economy. This research reports an active and stable tungsten phosphide (WP) cocatalyst as a potential replacement for Pt and Pd noble metal cocatalysts. WP nanoparticles are synthesized via a simple wet chemical process using less expensive and earth abundant materials. The synthesized WP cocatalyst nanoparticles are ball-milled and loaded onto the surface of a CdS photocatalyst, forming a WP/CdS composite. During visible light photocatalytic hydrogen production via the photocatalytic oxidation of an aqueous ammonium sulfite solution, the WP/CdS has shown high photocatalytic activity and stability in comparison with Pt and Pd noble metal cocatalysts. It is found that the 4.0 wt% WP loaded CdS photocatalyst can achieve as high as a 155.2 μmol h−1 hydrogen evolution rate, which is 11.67 times higher than that of the pure CdS photocatalyst and at about 1/3 of the hydrogen production rate (510.4 μmol h−1) of 0.5 wt% Pt loaded Pt/CdS. Electrochemical characterizations of the WP cocatalyst indicate that WP has high electrocatalytic activity and an efficient charge transfer rate between CdS and WP nanocrystals. These are the key factors responsible for the enhanced photocatalytic activity of the WP/CdS photocatalyst.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Huimin Mao,Xinyue Qu,Hongsheng Ma,Jingqi Chi,Zhenyu Xiao,Yongming Chai,Zexing Wu,Xiaobin Liu,Lei Wang
Seawater electrolysis is undoubtedly a more sustainable alternative to pure water electrolysis at present. However, it is hindered by the relatively slow kinetics of the oxygen evolution reaction and the detrimental effects of chloride ions in seawater that require resolution. In this study, we developed a straightforward synthesis method and successfully prepared FeNiCoMnCr high-entropy oxide (HEO). The strong coupling among multiple 3d orbitals of the transition metals allows for significant regulation of the catalyst’s electronic structure, enabling oxidation and reduction processes at the active site to spontaneously approach an equilibrium state. Additionally, Lewis acid Cr 6+ selectively adsorbs OH − , further enhancing both activity and stability of the catalyst in alkaline seawater. This research provides valuable insights into utilizing HEOs for seawater electrolysis and elucidates the roles of metals within HEOs.
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CATALYSIS LETTERS
·
2024
·
IF 2.3
Yan Xiaoxu,Zhao Xianfeng,Shao Xinxin,Li Kangpeng,Sun Minghong,Ji Xinpeng,Lu Huidan,Liu Yongping
Platinum-group metal ruthenium (Ru) is considered an ideal substitute for platinum (Pt) in the hydrogen evolution reaction (HER) due to its excellent electrocatalytic performance and cost that is 20 times lower than Pt. Herein, we prepared Ru-doped WO 3 nanosheets array on carbon cloth (CC) using the hydrothermal method, followed by successful high-temperature nitridation to obtain Ru-WN/CC nanoarray electrocatalysts. As prepared Ru-doped WN nanosheets exhibit a highly porous structure, providing abundant active sites for HER. Electrochemical performance tests demonstrate that compared to pristine WN/CC, 7% Ru-WN/CC exhibits a reduced overpotential of 94 mV at a current density of 10 mA cm -2 , with a Tafel slope of only 51.4 mV dec -1 and an Rct of 6.08 Ω. Moreover, it maintains high catalytic activity for at least 24 hours under acidic conditions. The superior electrocatalytic activity of Ru-WN/CC is attributed to the significant acceleration of the kinetic rate of WN electrocatalysts by Ru doping, the reduction of electronic transfer resistance in WN, and the enlargement of the electrochemically active surface area of WN. This study provides an important reference for the development of novel low noble metal-doped electrocatalytic materials and has guiding significance for the application of metal nitrides in water splitting for hydrogen production. Graphical Abstract
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Surfaces and Interfaces
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2024
·
IF 5.7
Longqian Wang,Pan Wang,Shuangqing Li,Huishan Shang,Dan Wang,Yafei Zhao,Bing Zhang
Designing transition metal-based heterointerfaces and creating defects are identified as prospective strategies for substituting the expensive noble metal-based catalysts for realizing efficient water electrocatalysis to alleviate the energy and environmental crisis. Herein, pleated sheet-like NiP 3 -NiB-FeB heterostructure nanoarrays with three-phase heterojunctions and luxuriant defects were developed and grown in-situ on carbon cloth as effective self-supported bifunctional electrocatalysts for water-splitting by a facile one-step solution titration method. As expected, the Ni 3 P-NiB-FeB reveals remarkable electrocatalytic performance, requiring only 134 mV and 275 mV overpotentials to achieve the current density of 10 mA cm −2 for HER and 100 mA cm −2 for OER, respectively, whose performance exceeds most transition metal-based catalysts in previous reports. More encouragingly, the electrolyzer with Ni 3 P-NiB-FeB as a working electrode can attain a current density of 10 mA cm −2 at a low voltage of 1.63 V accompanied by a long cycle stability of at least 36 h. The large specific surface area, abundant heterogeneous phase interfaces, and rich defective sites jointly contribute to the exposure of more active sites, regulation of the regional electron density, and promotion of the electrical conductivity, while the introduction of electronegativity P and electron-deficient B also impart Ni 3 P-NiB-FeB with strong electronic interactions and fast charge transfer, thus endowing Ni 3 P-NiB-FeB with excellent catalytic activity. This work opens up new opportunities in multi-phase heterointerfaces and defects engineering of transition metal-based borides and phosphides as efficient multifunctional electrocatalysts for practical water splitting.
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Small
·
2024
·
IF 13
Linyin Huang,Yuan Yu,Yanning Qu,Dongfeng Sun,Yuhao Fan,Pengpeng Qiang,Xinyue Wei,Qingmei Su,Xiaodong Hao,Gaohui Du,Bingshe Xu,Kai Wang
A novel porous amorphous-crystalline heterostructured CoNiP nanowire arrays ((a-c)CoNiP/CC) is presented. TEM observations and compositional calculations revealed ≈14.5% of the amorphous regions (a-CoNiP) are interleaved in the crystalline regions (c-(Co 3.6 Ni 0.4 )P 4 ), forming massive amorphous-crystalline heterogenous interfaces composed of the same elements. Only 38 and 64 mV overpotentials for the (a-c)CoNiP/CC catalyst are required to reach the current density of −10 mA cm 2 in acid and alkaline electrolyte, respectively, which is very close to the overpotentials (35 and 55 mV) of the commercial Pt/C HER catalyst. The theoretical calculation revealed that the (a-c)CoNiP/CC has a completely different enhancement mechanism of HER reaction in acid-base electrolytes. In particular, due to the natural corrosion resistance of the amorphous interface, the HER performance of this catalyst under the high current density condition is much better than that of the Pt/C catalyst either in acidic or in alkaline, suggesting its prospect for commercial applications.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yanqi Li,Han Li,Bingbing Sun,Jie Zheng,Tian Xu,Yuan Liu,Xiaorong Zhu,Shiqi Zhang,Sisi Liu,Ming Ge,Xiaolei Yuan
As a critical component for the oxygen reduction reaction (ORR), platinum (Pt) catalysts exhibit promising catalytic performance in High-temperature-proton exchange membrane fuel cells (HT-PEMFCs). Despite their success, HT-PEMFCs primarily utilize phosphoric acid-doped polybenzimidazole (PA–PBI) as the proton exchange membrane, and the phosphoric acid within the PBI matrix tends to leach onto the Pt-based layers, easily causing toxicity. Herein, we first propose UiO-66@Pt3Co1-T composites with precisely engineered interfacial structures. The UiO-66@Pt3Co1-T exhibits an octahedral porous framework with uniform structural dimensions and even distribution of surface nanoparticles, which demonstrate superior ORR performance compared to commercial Pt/C. The unique structure and morphology of the composites also exhibit a favorable half-wave potential in different concentrations of phosphoric acid electrolyte, regulated by the phosphoric acid adsorption site and intensity.This finding suggests that the incorporation of Co could effectively modulate the Pt d-band center, thereby enhancing the ORR performance. Furthermore, the selective adsorption of phosphoric acid by ZrO2 enables precise control over the phosphoric acid distribution. Notably, the retention of the octahedral framework post high-temperature treatment facilitates the establishment of dual transport pathways for gases and protons, leading to a stable and efficient triple-phase boundary.
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Small
·
2024
·
IF 13
Quanshuo Wu,Junli Wang,Xuanbing Wang,Jinlong Wei,Jing Wang,Can Zhang,Ruidong Xu,Linjing Yang
The rational design of highly active and durable non-noble electrocatalysts for hydrogen evolution reaction (HER) is significantly important but technically challenging. Herein, a phosphor and cobalt dual doped copper–nickel alloy (P, Co–CuNi) electrocatalyst with high–efficient HER performance is prepared by one-step electrodeposition method and reported for the first time. As a result, P, Co–CuNi only requires an ultralow overpotential of 56 mV to drive the current density of 10 mA cm −2 , with remarkable stability for over 360 h, surpassing most previously reported transition metal-based materials. It is discovered that the P doping can simultaneously increase the electrical conductivity and enhance the corrosion resistance, while the introduction of Co can precisely modulate the sub-nanosheets morphology to expose more accessible active sites. Moreover, XPS, UPS, and DFT calculations reveal that the synergistic effect of different dopants can achieve the most optimal electronic structure around Cu and Ni, causing a down-shifted d-band center, which reduces the hydrogen desorption free energy of the rate-determining step (H 2 O + e − + H* → H 2 + OH − ) and consequently enhances the intrinsic activity. This work provides a new cognition toward the development of excellent activity and stability HER electrocatalysts and spurs future study for other NiCu-based alloy materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xiaobo Yang,Shuang Liang,Guanzhihui Wang,Bao Zhou,Zhuoqi Duan,Zaixin Xie,Yongmao Hu
Developing oxygen evolution reaction (OER) electrocatalysts with high efficiency, low cost and good stability for water splitting is significant to relieve the energy crisis and environmental pollution. Herein, NiCo alloy (NC) nanoparticles (NPs) embedded N-doped carbon fibers (NCF) were prepared by electrospinning and carbonization. The surfaces of the NC@NCF were anchored with nanocrystalline NiCo 2 S 4 (NCS) in a following solvothermal process to form NCS-NC@NCF composite. Synergistic effect of the alloy (NC) and the semiconductor (NCS) was successfully stimulated, i.e., rapid charge separation and transfer was achieved during the OER process. In addition, the carbon fibers substrate is beneficial for good dispersion of the NC and NCS NPs as well as the conductivity improvement of the as-prepared NCS-NC@NCF catalyst. The prepared NCS-NC@NCF catalyst electrode owns good OER performances of a low overpotential of 291 mV, 342 mV and 376 mV to respectively deliver current densities of 10 mA cm −2 , 50 mA cm −2 and 100 mA cm −2 , which are respectively 19 mV, 82 mV and 116 mV lower than those of the RuO 2 electrode (310 mV, 424 mV and 492 mV), indicating the great potential of the catalyst in water splitting. Moreover, good durability of current density retention of 90.7 % is observed after 60 h of continuous OER polarization for the catalyst. Additionally, a two-electrode system composed of commercial Pt/C and the NCS-NC@NCF electrodes only needs a driven voltage of 1.51 V to afford 10 mA cm −2 for water splitting, which is superior to that (1.69 V) of the Pt/C||RuO 2 system.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
A.O.M. Alzahrani,Haseebul Hassan,Muhammad Waqas Iqbal,A.O. Alosaimi,S. Alghamdi,A.A. Melaibari,S.A. Al-Ghamdi,T.S. Almoneef,R.M Azahrani,Yas Al-Hadeethi
In the quest to bolster the electrochemical efficiency of metal oxide electrodes for high-performance hybrid supercapacitors, the integration of phosphorus doping emerges as a pivotal method. This study delves into the fabrication process of a specialized P-CNT on Cu–ZnO/NPC composite through a meticulous in-situ synthesis followed by phosphating. The strategic incorporation of phosphorus heteroatoms orchestrates a profound alteration in the electronic structure of the Cu–ZnO/NPC matrix, effectively augmenting its storage capabilites. The electrode showcases a commendable specific capacitance of 1619C/g. Making this innovation into a hybrid supercapacitor configuration (P-CNT@Cu–ZnO/NPC //activated carbon) yields an impressive energy density of 56.13 Wh/kg at 1250 W/kg. Even after enduring 10,000 exhaustive testing cycles, the device remarkably retains 98.0 % of its initial capacitance, affirming the resilience and enduring performance of this tailored design. In oxygen evolution reaction (OER) application, the P-CNT@Cu–ZnO/NPC electrode demonstrated 43.26 mV/dec tafel slope. These groundbreaking findings underscore the transformative potential of the P-CNT@Cu–ZnO/NPC composite in shaping the landscape of future energy storage electrode materials.
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RARE METALS
·
2024
·
IF 9.6
He Jin-Di,Wang Han-Du,Zhang Xu-Ming,Huang Li,Li Yun,Xia Lu,Pi Chao-Ran,Li Jian-Ping,Zheng Yang,Gao Biao,Huo Kai-Fu
The development of cost-effective, highly efficient and stable catalysts is critical to promote the industrial alkaline hydrogen evolution reaction (HER). However, single-component catalysts often cannot handle the multiple kinetic steps during hydrogen production. To address this challenge, a heterogeneous catalyst comprising metal Co, CoO and carbon-doped Mo 2 N (Co–CoO–C/Mo 2 N/CC) was synthesized by heat treatment of carbon cloth-supported CoMoO 4 microrods in a mixed reduction atmosphere. The resulting catalyst has rich interfaces, exhibiting excellent initial HER activity with an overpotential of 27 mV at 10 mA·cm −2 and a Tafel slope of 37 mV·dec −1 . Further studies show that the activity and stability of the catalyst can be tailored by the dynamic surface reconfiguration and doping effects. The carbon doping and high crystallinity in Mo 2 N help to reduce the dissolution of Mo and the surface metal Co is preferentially converted into stable Co(OH) 2 , thus stabilizing the structure of the catalyst and coordinating various reaction kinetics. In an electrolyzer comprising a heterogeneous Co–CoO–C/Mo 2 N cathode and NiFe layered double hydroxides (LDH) anode, only 1.58 V is required to achieve a current density of 50 mA·cm −2 , outperforming Pt/RuO catalysts. After continuous electrolysis for 100 h, the potential increases by merely 19 mV from the initial 1.58 V, indicating excellent stability. This study presents a novel strategy for developing highly active and stable heterogeneous catalysts, offering insights into the dynamic evolution of catalyst structures and laying the groundwork for designing efficient and stable composite catalysts for energy conversion applications. Graphical abstract
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