TY - JOUR
T1 - Three-dimensional bimetal TMO supported carbon based electrocatalyst developed via dry synthesis for hydrogen and oxygen evolution
AU - Elayappan, Vijayakumar
AU - Shanmugam, Ramakrishnan
AU - Chinnusamy, Sathiskumar
AU - Yoo, Dong Jin
AU - Mayakrishnan, Gopiraman
AU - Kim, Kihyun
AU - Noh, Hyun Sung
AU - Kim, Min Kyung
AU - Lee, Haigun
N1 - Funding Information:
This work was supported by the Materials and Components Technology Development Program of KEIT (Project No. 10053590 ). Appendix A
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - The rational design of highly efficient bifunctional electrocatalysts for the oxygen and hydrogen evolution reactions is still an ongoing challenge. Herein, bimetallic transition metal oxide incorporated three-dimensional (3D) nitrogen-doped graphene/carbon nanotube (CNT) conductive matrix has been developed via dry synthesis and applied as a potential catalyst for the oxygen and hydrogen evolution reactions. The key features of the structure as well as its 3D network, nitrogen doping, and metal oxide formation were confirmed using various characterization techniques such as scanning electron and transmission electron microscopies, X-ray diffraction, and X-ray photoelectron spectroscopy. A nickel cobalt oxide-incorporated 3D nitrogen-doped graphene/CNT conductive matrix (NCGC) exhibits low overpotentials of 290 and 214 mV at 10 mA cm−2 to drive the oxygen and hydrogen evolution reactions, respectively. Furthermore, the NCGC electrocatalyst maintains a reasonably long-term water electrolysis performance over 20 h, thought to be as a result of an improvement in the activity and stability of NCGC through the synergetic effects of the bimetallic transition oxide and 3D nitrogen-doped graphene/CNT. The overall electrochemical activity and stability of the prepared NCGC make it a good economical substitute for commercial noble metal-based catalysts for use in renewable energy production.
AB - The rational design of highly efficient bifunctional electrocatalysts for the oxygen and hydrogen evolution reactions is still an ongoing challenge. Herein, bimetallic transition metal oxide incorporated three-dimensional (3D) nitrogen-doped graphene/carbon nanotube (CNT) conductive matrix has been developed via dry synthesis and applied as a potential catalyst for the oxygen and hydrogen evolution reactions. The key features of the structure as well as its 3D network, nitrogen doping, and metal oxide formation were confirmed using various characterization techniques such as scanning electron and transmission electron microscopies, X-ray diffraction, and X-ray photoelectron spectroscopy. A nickel cobalt oxide-incorporated 3D nitrogen-doped graphene/CNT conductive matrix (NCGC) exhibits low overpotentials of 290 and 214 mV at 10 mA cm−2 to drive the oxygen and hydrogen evolution reactions, respectively. Furthermore, the NCGC electrocatalyst maintains a reasonably long-term water electrolysis performance over 20 h, thought to be as a result of an improvement in the activity and stability of NCGC through the synergetic effects of the bimetallic transition oxide and 3D nitrogen-doped graphene/CNT. The overall electrochemical activity and stability of the prepared NCGC make it a good economical substitute for commercial noble metal-based catalysts for use in renewable energy production.
KW - 3-D carbon matrix
KW - Dry synthesis
KW - Hydrogen evolution
KW - Nickel cobalt oxide
KW - Oxygen evolution
UR - http://www.scopus.com/inward/record.url?scp=85076199388&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2019.144642
DO - 10.1016/j.apsusc.2019.144642
M3 - Article
AN - SCOPUS:85076199388
SN - 0169-4332
VL - 505
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 144642
ER -
