NDLI: Co-vacancy-rich Co$_{1–x }$S nanosheets anchored on rGO for high-efficiency oxygen evolution

Content Provider	Springer Nature Link
Author	Zhu, Jiaqing Ren, Zhiyu Du, Shichao Xie, Ying Wu, Jun Meng, Huiyuan Xue, Yuzhu Fu, Honggang
Copyright Year	2017
Abstract	Developing cost-efficient electrocatalysts for oxygen evolution is vital for the viability of H$_{2}$ energy generated via electrolytic water. Engineering favorable defects on the electrocatalysts to provide accessible active sites can boost the sluggish reaction thermodynamics or kinetics. Herein, Co$_{1–x }$S nanosheets were designed and grown on reduced graphene oxide (rGO) by controlling the successive two-step hydrothermal reaction. A belt-like cobalt-based precursor was first formed with the assistance of ammonia and rGO, which were then sulfurized into Co$_{1–x }$S by L-cysteine at a higher hydrothermal temperature. Because of the non-stoichiometric defects and ultrathin sheet-like structure, additional cobalt vacancies (V’$_{Co}$) were formed/exposed on the catalyst surface, which expedited the charge diffusion and increased the electroactive surface in contact with the electrolyte. The resulting Co$_{1–x }$S/rGO hybrids exhibited an overpotential as low as 310 mV at 10 mA·cm$^{–2}$ in an alkaline electrolyte for the oxygen evolution reaction (OER). Density functional theory calculations indicated that the V’$_{Co}$ on the Co$_{1–x }$S/rGO hybrid functioned as catalytic sites for enhanced OER. They also reduced the energy barrier for the transformation of intermediate oxygenated species, promoting the OER thermodynamics.
Starting Page	1819
Ending Page	1831
Page Count	13
File Format	PDF
ISSN	19980124
Journal	Nano Research
Volume Number	10
Issue Number	5
e-ISSN	19980000
Language	English
Publisher	Tsinghua University Press
Publisher Date	2017-03-17
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cobalt vacancies (V′$_{Co}$) Co$_{1–x }$S oxygen evolution reaction electrocatalysis nanosheets Nanotechnology Materials Science Atomic/Molecular Structure and Spectra Condensed Matter Physics Biotechnology Biomedicine
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Active catalysts based on cobalt oxide@cobalt/N-C nanocomposites for oxygen reduction reaction in alkaline solutions

Photoreduction of CO$_{2}$ on BiOCl nanoplates with the assistance of photoinduced oxygen vacancies

Photocatalytic CO$_{2}$ reduction highly enhanced by oxygen vacancies on Pt-nanoparticle-dispersed gallium oxide

A highly active oxygen evolution electrocatalyst: Ultrathin CoNi double hydroxide/CoO nanosheets synthesized via interface-directed assembly

Engineering manganese oxide/nanocarbon hybrid materials for oxygen reduction electrocatalysis

Facile synthesis of Fe/Ni bimetallic oxide solid-solution nanoparticles with superior electrocatalytic activity for oxygen evolution reaction

Dynamic observation of oxygen vacancies in hafnia layer by in situ transmission electron microscopy

Spinel MnCo$_{2}$O$_{4}$ nanoparticles cross-linked with two-dimensional porous carbon nanosheets as a high-efficiency oxygen reduction electrocatalyst

In situ decomposition of metal-organic frameworks into ultrathin nanosheets for the oxygen evolution reaction

Co-vacancy-rich Co$_{1–x }$S nanosheets anchored on rGO for high-efficiency oxygen evolution

Similar Documents

Active catalysts based on cobalt oxide@cobalt/N-C nanocomposites for oxygen reduction reaction in alkaline solutions

Photoreduction of CO$_{2}$ on BiOCl nanoplates with the assistance of photoinduced oxygen vacancies

Photocatalytic CO$_{2}$ reduction highly enhanced by oxygen vacancies on Pt-nanoparticle-dispersed gallium oxide

A highly active oxygen evolution electrocatalyst: Ultrathin CoNi double hydroxide/CoO nanosheets synthesized via interface-directed assembly

Engineering manganese oxide/nanocarbon hybrid materials for oxygen reduction electrocatalysis

Facile synthesis of Fe/Ni bimetallic oxide solid-solution nanoparticles with superior electrocatalytic activity for oxygen evolution reaction

Dynamic observation of oxygen vacancies in hafnia layer by in situ transmission electron microscopy

Spinel MnCo$_{2}$O$_{4}$ nanoparticles cross-linked with two-dimensional porous carbon nanosheets as a high-efficiency oxygen reduction electrocatalyst

In situ decomposition of metal-organic frameworks into ultrathin nanosheets for the oxygen evolution reaction

Co-vacancy-rich Co$_{1–x }$S nanosheets anchored on rGO for high-efficiency oxygen evolution