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NiFe LDH/CuO nanosheet: a sheet-on-sheet strategy to boost the active site density towards oxygen evolution reaction
RSC Advances ( IF 3.9 ) Pub Date : 2020-7-22 , DOI: 10.1039/d0ra02985h
Benfeng Lin 1, 2 , Huafeng le 1, 2 , Feng Xu 1, 2 , Shichun Mu 3
Affiliation  

The amount of active sites of a catalyst is of great importance to enhance the oxygen evolution reaction (OER) activity. Here, the sheet-on-sheet strategy is proposed to effectively increase the density of active sites of NiFe layered double hydroxide (NiFe LDH) catalyst in terms of structural engineering. As a non-precious electrocatalyst for the OER, NiFe LDH is grown directly on CuO nanosheets. As a result, the received NiFe LDH/CuO nanosheet catalyst with sheet-on-sheet structure shows an ultralow overpotential of 270 mV at 20 mA cm−2, much lower than that of RuO2 as a benchmark. The CuO nanosheets, as substrate, play the vital role in downsizing the NiFe LDH, leading to the raised active site density.

中文翻译:

NiFe LDH/CuO纳米片:一种片对片策略,可提高活性位点密度以实现析氧反应

催化剂活性位点的数量对于提高析氧反应 (OER) 活性非常重要。在这里,提出了片上片策略,以在结构工程方面有效提高NiFe层状双氢氧化物(NiFe LDH)催化剂的活性位点密度。作为 OER 的非贵重电催化剂,NiFe LDH 直接生长在 CuO 纳米片上。结果,得到的具有片对片结构的NiFe LDH/CuO纳米片催化剂在20 mA cm -2下显示出270 mV的超低过电位,远低于作为基准的RuO 2 。作为基底的 CuO 纳米片在缩小 NiFe LDH 尺寸方面发挥着至关重要的作用,从而提高了活性位点密度。
更新日期:2020-07-22
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