塔菲尔方程
电催化剂
双功能
材料科学
析氧
聚苯胺
贵金属
分解水
催化作用
化学工程
纳米结构
无机化学
纳米技术
金属
电化学
化学
聚合
有机化学
电极
物理化学
聚合物
冶金
复合材料
光催化
工程类
作者
Samiran Garain,Cu Dang Van,Seungwoo Choi,Tru Nguyen Dang,Joel W. Ager,Ki Tae Nam,Hyeyoung Shin,Min Hyung Lee
标识
DOI:10.1002/admi.202200649
摘要
Abstract The development of a nonprecious, stable, and highly effective electrocatalyst for decomposition of water into oxygen and hydrogen is vitally important for sustainable energy conversion, but it still remains challenging to replace the noble metal electrocatalysts with more economically viable alternatives. Herein, a polyaniline (PANI) decorated hierarchical nickel cobalt thiospinel (NiCo 2 S 4 ) hybrid catalyst (NCS‐P) has been developed that shows enhanced dual catalytic activity for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) compared to pristine NiCo 2 S 4 (NCS). Benefiting from the conductive PANI coating, the hierarchical NCS‐P nanostructure exhibits outstanding electrocatalytic activity in alkaline solution with low overpotentials of 273 ± 3 and 77 ± 4 mV at 10 mA cm −2 and low Tafel slopes of 42.2 and 68.5 mV dec −1 for OER and HER, respectively, which are better than those of the benchmark noble‐metal‐based RuO 2 and Pt/C.
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