TY - JOUR
T1 - High-Performance Hydrogen Evolution by Ru Single Atoms and Nitrided-Ru Nanoparticles Implanted on N-Doped Graphitic Sheet
AU - Tiwari, Jitendra N.
AU - Harzandi, Ahmad M.
AU - Ha, Miran
AU - Sultan, Siraj
AU - Myung, Chang Woo
AU - Park, Hyo Ju
AU - Kim, Dong Yeon
AU - Thangavel, Pandiarajan
AU - Singh, Aditya Narayan
AU - Sharma, Pankaj
AU - Chandrasekaran, Selvaraj Selva
AU - Salehnia, Foad
AU - Jang, Ji Wook
AU - Shin, Hyeon Suk
AU - Lee, Zonghoon
AU - Kim, Kwang S.
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/7/12
Y1 - 2019/7/12
N2 - The most efficient electrocatalyst for the hydrogen evolution reaction (HER) is a Pt-based catalyst, but its high cost and nonperfect efficiency hinder wide-ranging industrial/technological applications. Here, an electrocatalyst of both ruthenium (Ru) single atoms (SAs) and N-doped-graphitic(GN)-shell-covered nitrided-Ru nanoparticles (NPs) (having a Ru-Nx shell) embedded on melamine-derived GN matrix {1: [Ru(SA)+Ru(NP)@RuNx@GN]/GN}, which exhibits superior HER activity in both acidic and basic media, is presented. In 0.5 m H2SO4/1 m KOH solutions, 1 shows diminutive “negative overpotentials” (−η = |η| = 10/7 mV at 10 mA cm−2, lowest ever) and high exchange current densities (4.70/1.96 mA cm−2). The remarkable HER performance is attributed to the near-zero free energies for hydrogen adsorption/desorption on Ru(SAs) and the increased conductivity of melamine-derived GN sheets by the presence of nitrided-Ru(NPs). The nitridation process forming nitrided-Ru(NPs), which are imperfectly covered by a GN shell, allows superb long-term operation durability. The catalyst splits water into molecular oxygen and hydrogen at 1.50/1.40 V (in 0.1 m HClO4/1 m KOH), demonstrating its potential as a ready-to-use, highly effective energy device for industrial applications.
AB - The most efficient electrocatalyst for the hydrogen evolution reaction (HER) is a Pt-based catalyst, but its high cost and nonperfect efficiency hinder wide-ranging industrial/technological applications. Here, an electrocatalyst of both ruthenium (Ru) single atoms (SAs) and N-doped-graphitic(GN)-shell-covered nitrided-Ru nanoparticles (NPs) (having a Ru-Nx shell) embedded on melamine-derived GN matrix {1: [Ru(SA)+Ru(NP)@RuNx@GN]/GN}, which exhibits superior HER activity in both acidic and basic media, is presented. In 0.5 m H2SO4/1 m KOH solutions, 1 shows diminutive “negative overpotentials” (−η = |η| = 10/7 mV at 10 mA cm−2, lowest ever) and high exchange current densities (4.70/1.96 mA cm−2). The remarkable HER performance is attributed to the near-zero free energies for hydrogen adsorption/desorption on Ru(SAs) and the increased conductivity of melamine-derived GN sheets by the presence of nitrided-Ru(NPs). The nitridation process forming nitrided-Ru(NPs), which are imperfectly covered by a GN shell, allows superb long-term operation durability. The catalyst splits water into molecular oxygen and hydrogen at 1.50/1.40 V (in 0.1 m HClO4/1 m KOH), demonstrating its potential as a ready-to-use, highly effective energy device for industrial applications.
KW - electrocatalysts
KW - hydrogen evolution reaction
KW - nitrided-Ru nanoparticles
KW - single atoms
KW - water splitting
UR - https://www.scopus.com/pages/publications/85081708489
U2 - 10.1002/aenm.201900931
DO - 10.1002/aenm.201900931
M3 - Article
AN - SCOPUS:85081708489
SN - 1614-6832
VL - 9
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 26
M1 - 1900931
ER -
