Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 17, Pages 15528-15536Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b00592
Keywords
hydrogen evolution reaction; electrocatalysis; heterostructure; transition metal phosphides; water splitting
Funding
- National Natural Science Foundation of China [51572296, U1662113]
- Fundamental Research Funds for the Central Universities [15CX08005A, 17CX06029]
- Scientific Research and Technology Development Project of Petrochina Co., LTD [2016B-2004(GF)]
- Taishan Scholar Project
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Electrocatalytic hydrogen evolution reaction, the cornerstone of the emerging hydrogen economy, can be essentially facilitated by robustly heterostructural electrocatalysts. Herein, we report a highly active and stably heterostructural electrocatalyst consisting of NiCoP nanowires decorated with CoP nanoparticles on a nickel foam (NiCoP-CoP/NF) for effective hydrogen evolution. The CoP nanoparticles are strongly interfaced with NiCoP nanowires producing abundant electrocatalytically active sites. Combined with the integrated catalyst design, NiCoP-CoP/NF affords a remarkable hydrogen evolution performance in terms of high activity, enhanced kinetics, and outstanding durability in an alkaline electrolyte, superior to most of the Co (or NO-phosphide-based catalysts reported previously. Density functional theory calculations demonstrate that there is an interfacial effect between NiCoP and CoP, which allows a preferable hydrogen adsorption and thus contributes to the significantly enhanced performance. Furthermore, an electrolyzer employing NiCoP-CoP/NF as the cathode and RuO2/NF as the anode (NiCoP-CoP/NF parallel to RuO2/NF) exhibits excellent water-splitting activity and outstanding durability, which is comparable to that of the benchmark Pt-C/NF parallel to RuO2/NF electrolyzer.
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