journal article·2024-01-17

Nickel Nanoparticles Protruding from Molybdenum Carbide Micropillars with Carbon Layer-Protected Biphasic 0D/1D Heterostructures for Efficient Water Splitting

Jingqiang Wang, Yu Su, Yan-Jiang Li, Hong-Wei Li, Jun-Xu Guo, Qing-Qun Sun, Hai-Yan Hu, Yi-Feng Liu, Xin-Bei Jia, Zhuang-Chun Jian, Ling-Yi Kong, Han-Xiao Liu, Jia-Yang Li, Haibin Chu, Shi-Xue Dou, Yao Xiao

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Abstract

It remains a tremendous challenge to achieve high-efficiency bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) for hydrogen production by water splitting. Herein, a novel hybrid of 0D nickel nanoparticles dispersed on the one-dimensional (1D) molybdenum carbide micropillars embedded in the carbon layers (Ni/Mo 2 C@C) was successfully prepared on nickel foam by a facile pyrolysis strategy. During the synthesis process, the nickel nanoparticles and molybdenum carbide were simultaneously generated under H 2 and C 2 H 2 mixed atmospheres and conformally encapsulated in the carbon layers. Benefiting from the distinctive 0D/1D heterostructure and the synergistic effect of the biphasic Mo 2 C and Ni together with the protective effect of the carbon layer, the reduced activation energy barriers and fast catalytic reaction kinetics can be achieved, resulting in a small overpotential of 96 mV for the HER and 266 mV for the OER at the current density of 10 mA cm –2 together with excellent durability in 1.0 M KOH electrolyte. In addition, using the developed Ni/Mo 2 C@C as both the cathode and anode, the constructed electrolyzer exhibits a small voltage of 1.55 V for the overall water splitting. The novel designed Ni/Mo 2 C@C may give inspiration for the development of efficient bifunctional catalysts with low-cost transition metal elements for water splitting.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China

Institute for Carbon Neutralization, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China

Wenzhou Key Laboratory of Sodium-lon Batteries, Wenzhou University Technology Innovation Institute for Carbon Neutralization, Wenzhou, Zhejiang 325035, China

Institute of Energy Materials Science (IEMS), University of Shanghai for Science and Technology, Shanghai 200093, China

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China

Funding

State Key Laboratory of Electrical Insulation and Power Equipment · China Scholarship Council · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · Doctoral Innovation Foundation of Wenzhou University · Wenzhou Natural Science Foundation · Wenzhou key scientific and technological innovation research projects · Cooperation between industry and education project of Ministry of Education

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