TY - JOUR
T1 - Ru incorporated into Se vacancy-containing CoSe2 as an efficient electrocatalyst for alkaline hydrogen evolution
AU - Liu, Li
AU - Yang, Ziyi
AU - Gao, Weibo
AU - Shi, Jianghuan
AU - Ma, Jieyun
AU - Liu, Zongjian
AU - Wang, Lin
AU - Wang, Yichao
AU - Chen, Zhengfei
N1 - Publisher Copyright:
© 2024 The Royal Society of Chemistry.
PY - 2024/8/30
Y1 - 2024/8/30
N2 - In alkaline media, slow water dissociation leads to poor overall hydrogen evolution performance. However, Ru catalysts have a certain water dissociation performance, thus regulating the Ru-H bond through vacancy engineering and accelerating water dissociation. Herein, an excellent Ru-based electrocatalyst for the alkaline HER has been developed by incorporating Ru into Se vacancy-containing CoSe2 (Ru-VSe-CoSe2). The results from X-ray photoelectron spectroscopy, kinetic isotope effect, and cyanide poisoning experiments for four catalysts (namely Ru-VSe-CoSe2, Ru-CoSe2, VSe-CoSe2, and CoSe2) reveal that Ru is the main active site in Ru-VSe-CoSe2 and the presence of Se vacancies greatly facilitates electron transfer from Co to Ru via a bridging Se atom. Thus, electron-rich Ru is formed to optimize the adsorption strength between the active site and H*, and ultimately facilitates the whole alkaline HER process. Consequently, Ru-VSe-CoSe2 exhibits an excellent HER activity with an ultrahigh mass activity of 44.2 A mgRu−1 (20% PtC exhibits only 3 A mgRu−1) and a much lower overpotential (29 mV at 10 mA cm−2) compared to Ru-CoSe2 (75 mV), VSe-CoSe2 (167 mV), CoSe2 (190 mV), and commercial Pt/C (41 mV). In addition, the practical application of Ru-VSe-CoSe2 is illustrated by designing a Zn-H2O alkaline battery with Ru-VSe-CoSe2 as the cathode catalyst, and this battery shows its potential application with a maximum power density of 4.9 mW cm−2 and can work continuously for over 10 h at 10 mA cm−2 without an obvious decay in voltage.
AB - In alkaline media, slow water dissociation leads to poor overall hydrogen evolution performance. However, Ru catalysts have a certain water dissociation performance, thus regulating the Ru-H bond through vacancy engineering and accelerating water dissociation. Herein, an excellent Ru-based electrocatalyst for the alkaline HER has been developed by incorporating Ru into Se vacancy-containing CoSe2 (Ru-VSe-CoSe2). The results from X-ray photoelectron spectroscopy, kinetic isotope effect, and cyanide poisoning experiments for four catalysts (namely Ru-VSe-CoSe2, Ru-CoSe2, VSe-CoSe2, and CoSe2) reveal that Ru is the main active site in Ru-VSe-CoSe2 and the presence of Se vacancies greatly facilitates electron transfer from Co to Ru via a bridging Se atom. Thus, electron-rich Ru is formed to optimize the adsorption strength between the active site and H*, and ultimately facilitates the whole alkaline HER process. Consequently, Ru-VSe-CoSe2 exhibits an excellent HER activity with an ultrahigh mass activity of 44.2 A mgRu−1 (20% PtC exhibits only 3 A mgRu−1) and a much lower overpotential (29 mV at 10 mA cm−2) compared to Ru-CoSe2 (75 mV), VSe-CoSe2 (167 mV), CoSe2 (190 mV), and commercial Pt/C (41 mV). In addition, the practical application of Ru-VSe-CoSe2 is illustrated by designing a Zn-H2O alkaline battery with Ru-VSe-CoSe2 as the cathode catalyst, and this battery shows its potential application with a maximum power density of 4.9 mW cm−2 and can work continuously for over 10 h at 10 mA cm−2 without an obvious decay in voltage.
UR - http://www.scopus.com/inward/record.url?scp=85204205637&partnerID=8YFLogxK
U2 - 10.1039/d4nr02735c
DO - 10.1039/d4nr02735c
M3 - Article
C2 - 39253762
AN - SCOPUS:85204205637
SN - 2040-3364
VL - 16
SP - 18421
EP - 18429
JO - Nanoscale
JF - Nanoscale
IS - 39
ER -
