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Hollow Hydrangea‐Like CoRu/Co Architecture as an Excellent Electrocatalyst for Oxygen Evolution
Author(s) -
Chen Qian,
Yang Dandan,
Wang Yi,
Long Yan,
Fan Guangyin
Publication year - 2021
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202101316
Subject(s) - oxygen evolution , overpotential , catalysis , electrocatalyst , water splitting , materials science , chemical engineering , superstructure , tafel equation , electron transfer , layered double hydroxides , chemistry , photochemistry , electrochemistry , photocatalysis , electrode , organic chemistry , oceanography , engineering , geology
Developing low‐cost but efficient electrocatalysts to promote the sluggish kinetics of oxygen evolution from water splitting is essential for hydrogen production. In this study, a hierarchical hollow hydrangea‐like CoRu/Co superstructure is constructed through a self‐templating method by morphology‐controlled pyrolysis of flower‐like Ru‐doped Co‐based layered double hydroxides (LDH). The anchoring of Ru into Co−LDH is the key to the formation of well‐defined hydrangea‐like three‐dimensional superstructure composed of CoRu/Co. The optimized CoRu/Co−M‐350 with a low Ru loading of 3.0 wt% exhibits excellent catalytic performances in the oxygen evolution reaction (OER) with low overpotential ( η 10 =192 mV) and excellent stability for 100 h at 100 mA cm −2 in alkaline media, outperforming the benchmark RuO 2 and most reported electrocatalysts. The superior morphology and structural features of CoRu/Co−M‐350 provide not only abundant accessible surface sites but also fast mass and electron transfer, thereby promoting OER catalysis. The present study provides a new synthetic route for preparing highly active OER electrocatalysts.