ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 8
·2306061
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IF 19
Zhixiao Zhu,Li Luo,Yanxiang He,Muhammad Mushtaq,Jieqiong Li,Hao Yang,Zeba Khanam,Jing Qu,Zhongmin Wang,M.-Sadeeq Balogun
Realizing efficient electrocatalysts is a stepping stone toward achieving high-performance alkaline water/seawater electrolysis, but remains a crucial challenge. Herein, heterogeneous Mo 2 N/Ni 3 Mo 3 N electrocatalysts on nickel foam (denoted MN-NMN/NF) that is stable and active for the hydrogen evolution reaction (HER) in both alkaline water/seawater are demonstrated. The optimized MN-NMN09/NF achieves an ultralow HER overpotential of 11 mV@10 mA cm −2 in 1.0 m KOH electrolyte, which is not only superior to the benchmark Pt/C catalysts but also the best reported ever among NiMo-based electrocatalysts in an alkaline environment. Successively, the optimized MN-NMN09/NF electrocatalyst can drive HER current densities of 10 and 500 mA cm −2 using low overpotentials of 9.37 and 123 mV in 1.0 m KOH seawater electrolyte, which remains durable after 120 h long-term electrolysis at a constant current density of 500 mA cm −2 . In situ Raman analysis reveals that the enhanced performance is attributed to the accelerated H 2 O adsorption and OH dissociation processes on the MN-NMN surfaces. Theoretical analysis further confirms that rapid H 2 O adsorption-dissociation kinetics and H adsorption-conversion kinetics on the Ni 3 Mo 3 N/NiOOH and Ni 3 Mo 3 N/MoO x surfaces result in boosted HER capability. This work depicts a significant potential for designing stable and efficient hydrogen production electrocatalysts for both alkaline water and seawater electrolysis.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Meng Song,Jinbo Wang,Xiao Zhang,Jinxue Guo
Seawater electrolysis to produce hydrogen and oxygen is an attractive candidate for renewable energy, but bottlenecks still remain to develop efficient and stable electrocatalysts. Herein, the N-doped carbon enveloped CoP hierarchical core-shell structured nanoarray is fabricated on carbon fiber cloth through a controllable approach. Scanning electron microscope and transmission electron microscope reveal the nanoarray architecture and core-shell structure of CoP@NC. When tested as bifunctional catalysts toward water electrolysis, the sample demonstrates efficient catalysis performances with low HER overpotentials of 136/139 mV and OER overpotentials of 238/244 mV to generate a current density of 100 mA cm −2 in alkaline water/seawater, respectively. The two-electrode system of CoP@NC/CC= |CoP@NC/CC needs low cell voltage of 1.68 V to yield 100 mA cm −2 in alkaline seawater, which can maintain the performance for over 100 h. The charming hierarchical core-shell structure, appropriate components, and specific nanoarray morphology are synergistically responsible for the good electrocatalysis performances.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Zhaoping Shi,Ziang Wang,Hongxiang Wu,Meiling Xiao,Changpeng Liu,Wei Xing
The development of high-performance oxygen evolution reaction catalysts with low iridium content is the key to the scale-up of proton exchange membrane water electrolyzer (PEMWE) for green hydrogen production. Single-site electrocatalysts with maximized atomic efficiency are held as promising candidates but still suffer from inadequate activity and stability in practical electrolyzer due to the low site density. Here, we proposed a NaNO 3 -assistant thermal decomposition strategy for the preparation of high-density Ir single sites on MnO 2 substrate (NaNO 3 -H-Ir-MnO 2 ). Direct spectroscopic evidence suggests the inclusion of NaNO 3 accelerates the transformation of Ir-Cl to Ir-O coordination, thus generating uniform dispersed high-density Ir single sites in the products. The optimized H-Ir-MnO 2 demonstrates not only high intrinsic activity in a three-electrode set-up but also boosted performance in scalable PEMWE, requiring a cell voltage of only 1.74 V to attain a high current density of 2 A cm ‒2 at a low Ir loading of 0.18 mg Ir cm ‒2 . This work offers a new insight for enhancing the industrial practicality of Ir-based single site catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Dingcheng Sun,Le Zhang,Shengjie Wei,Xu Zhang,Haiyang Xu,Xuan Tong,Xu Ji,Yue Yang
The development of durable, high-performance electrocatalysts capable of sustaining industrial-level current densities is critical for advancing alkaline water electrolysis. In this work, we present a hierarchical Co 9 S 8 /NiS heterojunction directly grown on nickel foam via hydrothermal and controlled sulfurization process. The self-supported electrode delivers low overpotentials of 260 mV (OER) and 40 mV (HER) at 10 mA cm −2 in 1 M KOH. Long-term stability tests of OER and HER respectively confirm 95 % and 96 % current retention at 100 mA cm −2 over 30 h. When employed in a two-electrode configuration, the Co 9 S 8 /NiS@NF electrode pair achieves 10 mA cm −2 overall water splitting at just 1.38 V, outperforming most reported transition-metal sulfide systems. Comprehensive structural and spectroscopic analyses reveals that intimate electronic coupling at the Co 9 S 8 /NiS interface, together with abundant sulfur vacancies, synergistically optimizes charge distribution and lowers kinetic barriers. Moreover, the integrated nano-flower and nano-needle morphology of self-supporting integrated electrode provides an expanded electrochemically active surface area and efficient mass-transport channels. This dual-modulation strategy—combining heterojunction engineering with defect chemistry—provides a scalable path for designing non-precious-metal electrocatalysts that meet the demands of practical hydrogen production.
研究领域:
电化学
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材料科学
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纳米技术
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能量转换
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催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiahao Yang,Zhaoping Shi,Yibo Wang,Hongxiang Wu,Jing Ni,Pengbo Wang,Meiling Xiao,Changpeng Liu,Wei Xing
Despite proton exchange membrane water electrolysis (PEMWE) being a commercially viable method for high-purity hydrogen production, the development of active and robust anode electrocatalysts with reduced iridium loading under high current density conditions remains highly challenging. Here, we report a core-shell nanostructured catalyst with a metallic titanium core uniformly covered by Ir nanoparticles (Ti@Ir). The spontaneously formed TiO x layer can effectively disperse Ir nanoparticles via interfacial Ti-O-Ir bonds, which in turn increases the oxidation state of Ir towards activated lattice oxygen reactivity, as confirmed by in-situ differential electrochemical mass spectrometry (DEMS). As a result, the Ti@Ir exhibits an overpotential of only 272 mV to reach 10 mA cm −2 , 17 mV lower than non-supported Ir nanoparticles, and a 3.82-fold higher mass activity at 1.53 V. Moreover, the Ti@Ir catalyst demonstrates strong stability during a 100-hour test at 10 mA cm −2 . Detailed analysis reveals that the oxidation of iridium close to the titanium core is suppressed. The huge potential for practical application is further confirmed in a PEMWE prototype, with a low iridium loading of 0.5 mg Ir cm −2 , significantly lower than the typical 2 ∼ 4 mg Ir cm −2 required for traditional catalysts. This Ti@Ir catalyst achieves a cell voltage of 1.858 V at an industrial-level current density of 2 A cm −2 and maintains stable operation for 1800 h with an exceptionally low voltage degradation rate of only 1.252 μV h −1 .
研究领域:
材料科学
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能源技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Mei Yang,Shilin Zhang,Tian Wang,Beibei Shi,Jingyan Liu,Yili Tang,Zonglin Xu,Muhammad Tariq Sarwar,Aidong Tang,Huaming Yang
The key to the development of non-noble metal catalysts with high activity and durability for the hydrogen evolution reaction (HER) in alkaline water/seawater conditions is to construct multi-interface electrocatalysts. Herein, the CoMoO4 nanorod arrays grown on foam nickel (NF) was first prepared by a hydrothermal method. Then, Ni(PO3)2-CoP4 with multi-interface was prepared by soaking the nanorod arrays into a nickel nitrate solution and then by phosphating via chemical vapor deposition. The Ni(PO3)2-CoP4/CoMoO4/NF electrode exhibits superior HER electrocatalytic performance under alkaline conditions with an ultralow overpotential of 79 mV@100 mA·cm–2, which outperforms other reported earth–abundant transition-metal phosphide catalysts. It also maintains long-term durability in alkaline water/seawater electrolytes in 60 h at a constant 100 mA·cm–2. In the alkaline natural seawater electrolyte, Ni(PO3)2-CoP4/CoMoO4/NF (−)||NiFe LDH (+) pair has good long-term stability of 60 h for the voltage of only 1.60 V@100 mA·cm–2. The excellent performance is attributed to the plentiful active sites and the rapid electron-transfer rate. This work affords a new path to rationalize the design strategy of low-cost and multi-interface 3D catalysts for alkaline water/seawater electrolysis.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Xiaoyu Lu,Congling Li,Li Zhang,Wei Xia,Rui Liu,Aifeng Lv
The rational design of efficient, cost-effective, and durable electrocatalysts is crucial for the realization of hydrogen production through water splitting. The present study describes the synthesis of a novel three-dimensional (3D) volcano-like Fe 3 S 4 /Ni 3 S 2 /WO 3 /NiFe LDH/NF (Layered Double Hydroxides/Nickel Foam) electrocatalyst with a highly wrinkled structure through a two-step hydrothermal method. The as-synthesized electrocatalyst exhibits an exceptionally low overpotential of 77 mV for the hydrogen evolution reaction (HER) and 131 mV for the oxygen evolution reaction (OER) at a current density of 10 mA cm −2 , owing to the unique morphology and strong electronic interactions between Fe 3 S 4 , Ni 3 S 2 and WO 3 heterostructures. The Fe 3 S 4 /Ni 3 S 2 /WO 3 /NiFe LDH/NF electrocatalyst demonstrates exceptional performance in overall water splitting when employed as both anode and cathode, achieving a current density of 10 mA cm −2 at an impressively low cell voltage of 1.5 V as well as exhibiting remarkable durability with little degradation over a period of 12 hours. This study presents a straightforward approach for the synthesis of highly efficient and durable non-noble metal catalysts for overall water splitting under hydrothermal conditions.
研究领域:
材料科学
·
电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuhua Xie,Xinxin Yu,Xianwei Li,Xue Long,Chaofeng Chang,Zehui Yang
The industrialization of solid polymer electrolyte water electrolysis (SPEWE) dominantly relies on electrocatalyst with high stability and efficiency for oxygen evolution reaction (OER) catalysis. In this work, we report a facile method to construct α-Ni(OH) 2 @Ir core–shell nanoparticles as bifunctional electrocatalyst for acidic overall water splitting application. α-Ni(OH) 2 @Ir requires lower overpotentials (238 mV and 20 mV) to achieve 10 mA cm −2 in acidic OER and HER catalysis compared to benchmarked IrO 2 (332 mV) and Pt/C (36 mV); meanwhile, the OER mass activity at 1.55 V vs. RHE was 92 fold higher than IrO 2 ; HER mass activity at overpotential of 80 mV was 5 fold better than Pt/C. The boosted catalytic activity is due to the enhanced utilization efficiency of Ir stemmed from the ultrathin Ir shell (~1 nm). Moreover, 1.49 V is demanded for α-Ni(OH) 2 @Ir to attain 10 mA cm −2 in acidic overall water splitting, 110 mV lower than benchmarked Pt/C-IrO 2 system. Meanwhile, stable catalytic performance is recorded for 20 h.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2021
·
IF 3.627
Zhiruo Shen,Changhua Xu,Sumin Wang,Jian Chen,Siqin Jia,Qiguan Wang
Electrolysis of water is a promising method for production of the green-energy hydrogen, which is commonly assisted by high powerful catalyst. At present, developing low-cost and highly efficient electrocatalysts has attracted increasing attention. Herein, a novel composited catalyst of Zn x Ni 1-x S@Mo 2 C loaded on conductive carbon cloth (Zn x Ni 1-x S@Mo 2 C/CC) is successfully prepared by the hydrothermal method . Due to the abundant active sites of defect structures induced by the surface engineering, the prepared Zn x Ni 1-x S@Mo 2 C/CC shows outstanding electrocatalytic performances in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) of water splitting, with low overpotential of 230 mV and 150 mV at 10 mA cm −2 , respectively. The Zn x Ni 1-x S@Mo 2 C/CC as an OER/HER bifunctional catalyst for overall water splitting affords a stable voltage of 1.56 V @current density of 10 mA cm −2 . Moreover, the catalyst shows an outstanding stability after a series of electrochemical tests. This work expands the multi-field applications of carbon cloth-supported materials as efficient non-precious metal-based electrocatalysts , with great importance in sustainable energy-relative technologies.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tengfei Zhang,Dan Xu,Ping Liu,Long Chen,Wen Guo,Tiantian Gu,Feng Yu,Yanyan Liu,Gang Wang
The development of economical, efficient, and durable bifunctional catalyst for overall water splitting is an attractive and challenging task. Herein, a novel defect-rich 2D/2D heterostructure is constructed by vertically growing S-doped NiMoO 4 (NiMoO 4 -S) nanosheets on nickel sulfide (Ni 3 S 2 ) nanosheet arrays supported on nickel foam (NF) using a two-step hydrothermal method. Benefiting from the hierarchical sheet-on-sheet heterogeneous nanostructure and abundant oxygen vacancies for more active sites, efficient electronic/mass transfer, and fast gas release, the synthesized NiMoO 4 -S/Ni 3 S 2 /NF electrode exhibits excellent electrocatalytic performance for HER (η 10 mA cm −2 = 107 mV) and OER (η 50 mA cm −2 = 285 mV). The alkaline water electrolyzer with NiMoO 4 -S/Ni 3 S 2 /NF as the positive and negative electrodes can provide a current density of 10 mA cm −2 with the potential of 1.52 V, which is below that of the commercial Pt||RuO 2 /NF system or many other reported systems. More importantly, the alkaline water electrolyzer offers a current density of 100 mA cm −2 at 1.85 V with outstanding durability of over 50 h. This research points to a promising route in designing transition metal-based bifunctional electrocatalysts for large-scale energy conversion applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Functional Materials Letters
·
2024
·
IF 1.2
Yaoting Wang,Zhiling Chou,Huimin Zhang,Yiming Zou,Junfu Wang,Haochen Ding,Hong Zhao,Song Wang,Xin Xiao
The electrochemical decomposition of water to produce hydrogen using clean energy sources has become a sustainable pathway for hydrogen utilization, with efficient hydrogen evolution reaction (HER) electrocatalysts crucial for high energy conversion efficiency. Nickel phosphide is widely utilized in the electrocatalytic HER owing to its unique electronic properties, efficient electrocatalytic performance, and excellent corrosion resistance. However, the HER activity of nickel–phosphide electrocatalysts remains low, necessitating further research for practical applications. This paper introduces a method for preparing Ru-doped Ni 5 P 4 , including the mechanism of the HER, the preparation of Ru@Ni 5 P 4 , and its performance in electrocatalytic hydrogen evolution. The preparation methods for the Ru@Ni 5 P 4 electrocatalyst were classified, with a focus on the preparation techniques and research progress regarding its HER activity. The HER activities of the pure Ni 5 P 4 , Ru@Ni 5 P 4 , and 10 wt.% Pt/C electrodes were compared based on experimental indicators such as the overpotential and Tafel slope at a specific current density.
研究领域:
材料科学
·
电化学
·
能源化学
·
催化化学
·
可持续能源
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2017
·
IF 10.614
Cheng Du,Lan Yang,Fulin Yang,Gongzhen Cheng,Wei Luo
The investigation of high-efficiency nonprecious electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of great significance for renewable energy technologies. Here, we provide a successive hydrothermal, oxidation, and phosphidation method to fabricate a 3D nest-like ternary NiCoP/carbon cloth (CC) electrocatalyst with superior catalytic activity and stability toward HER/OER. Nest-like NiCoP/CC requires overpotentials of 44 and 62 mV to reach the current density of 10 mA cm–2 in acidic and alkaline media, respectively, toward HER. For OER, the NiCoP/CC exhibits high active and durable performance with an overpotential of 242 mV at current density of 10 mA cm–2 in alkaline solutions. Furthermore, the practical application of NiCoP/CC as a bifunctional catalyst for overall water splitting reaction yields current densities of 10 and 100 mA cm–2 at 1.52 and 1.77 V, respectively.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）