Digraskar Renuka V, Sapner Vijay S, Ghule Anil V, Sathe Bhaskar R
Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, Maharashtra, India.
Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India.
ACS Omega. 2019 Nov 5;4(21):18969-18977. doi: 10.1021/acsomega.9b01680. eCollection 2019 Nov 19.
Using emergent highly proficient and inexpensive non-noble metal-based bifunctional electrocatalysts to overall water splitting reaction is a pleasingly optional approach to resolve greenhouse gases and energy anxiety. In this work, oleylamine-functionalized graphene oxide/CuZnSnS composite (OAm-GO/CZTS) is prepared and investigated as a higher bifunctional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The OAm-GO/CZTS shows brilliant electrocatalytic performance and durability toward H and O in both acidic and basic media, with overpotentials of 47 mV for HER and 1.36 V for OER at a current density of 10 mA cm and Tafel slopes of 64 and 91 mV dec, respectively, which are extremely higher to those of transition metal chalcogenide and as good as of commercial precious-metal catalysts.
使用新兴的高效且廉价的非贵金属基双功能电催化剂来进行全水解反应，是解决温室气体和能源焦虑问题的一种令人满意的可选方法。在这项工作中，制备了油胺功能化的氧化石墨烯/CuZnSnS复合材料（OAm-GO/CZTS），并将其作为用于析氢反应（HER）和析氧反应（OER）的更高性能双功能电催化剂进行研究。OAm-GO/CZTS在酸性和碱性介质中对H和O均表现出出色的电催化性能和耐久性，在电流密度为10 mA cm时，HER的过电位为47 mV，OER的过电位为1.36 V，塔菲尔斜率分别为64和91 mV dec，这比过渡金属硫族化物的相应值高得多，并且与商业贵金属催化剂相当。
