NiCoS_{x}@Cobalt Carbonate Hydroxide Obtained by Surface Sulfurization for Efficient and Stable Hydrogen Evolution at Large Current Densities

Xian Zhang; Renji Zheng; Mengtian Jin; Run Shi; Zhong Ai; Abbas Amini; Qing Lian; Chun Cheng; Shaoxian Song

doi:10.1021/acsami.1c07504

journal article·2021-08-04

NiCoS_x@Cobalt Carbonate Hydroxide Obtained by Surface Sulfurization for Efficient and Stable Hydrogen Evolution at Large Current Densities

Xian Zhang, Renji Zheng, Mengtian Jin, Run Shi, Zhong Ai, Abbas Amini, Qing Lian, Chun Cheng, Shaoxian Song

ACS Applied Materials & Interfaces· Volume 13· Issue 30

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Source abstract

Abstract

Developing earth-abundant, active, and stable electrocatalysts for hydrogen evolution reactions (HERs) at large current densities has remained challenging. Herein, heterostructured nickel foam-supported cobalt carbonate hydroxide nanoarrays embellished with NiCoSx nanoflakes (NiCoSx@CoCH NAs/NF) are designed via room-temperature sulfurization, which can drive 10 and 1000 mA cm–2 at low overpotentials of 55 and 438 mV for HER and exhibit impressive long-term stability at the industrial-level current density. Surprisingly, NiCoSx@CoCH NAs/NF after a 500 h stability test at 500 mA cm–2 exhibit better catalytic performance than the initial one at high current densities. Simulations showed that NiCoSx@CoCH NAs have an optimized hydrogen adsorption free energy (ΔGH*) of 0.02 eV, owing to the synergistic effect of CoCH (ΔGH* = 1.36 eV) and NiCoSx (ΔGH* = 0.03 eV). The electric field at the heterostructure interface leads to electron transport from CoCH to NiCoSx, which enhances HER dynamics. The hierarchical nanostructure has a large specific area and a superaerophobic surface, which are beneficial to hydrogen generation/release for efficient and stable HER.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Advanced Photocatalysis Techniques

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

Affiliations

School of Resources and Environmental Engineering and Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, China

School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China

Center for Infrastructure Engineering, Western Sydney University, Kingswood, New South Wales 2751, Australia

Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, P. R. China

Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen 518055, China

Funding

Ministry of Education of the People's Republic of China · Science, Technology and Innovation Commission of Shenzhen Municipality · National Natural Science Foundation of China · Guangdong Basic and Applied Basic Research Foundation

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