聚吡咯
材料科学
离解(化学)
化学工程
分子
电催化剂
电解
催化作用
导电聚合物
电解水
动力学
聚合物
纳米技术
电极
聚合
电化学
吸附
物理化学
电解质
有机化学
化学
复合材料
工程类
物理
量子力学
作者
Haihong Zheng,Yang Fu,Tuzhi Xiong,David Adekoya,Yongchao Huang,Muhammad‐Sadeeq Balogun
标识
DOI:10.1021/acsami.0c16938
摘要
The water dissociation step (H2O + M + e– → M – Hads + OH–) is a crucial one toward achieving high-performance hydrogen evolution reaction (HER). The application of electronic conducting polymers (ECPs), such as polypyrrole (PPy), as the electrocatalyst for HER is rarely reported because of their poor adsorption energy per water molecule, which hinders the Volmer step. Herein, we strongly enrich PPy hollow microspheres (PPy-HMS) with attractive HER activity by enhancing their hydrophilic properties through hybridization with good water affinity SiO2. The as-prepared PPy-coated SiO2 (PPy@SiO2-HMS) achieves a current density of 10 mA cm–2 at −123 mV, which is lower than that of pristine PPy-HMS (−192 mV). Raman and X-ray photospectroscopy analyses reveal that the enhanced HER catalytic capability can be attributed to the strong electronic couplings between PPy and SiO2, and this improves the adsorption energy per water molecule and in turn accelerates the water dissociation kinetics on PPy. This work highlights the potential application of low-cost ECPs as promising electrocatalysts for water electrolysis.
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