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Title: Materializing efficient methanol oxidation via electron delocalization in nickel hydroxide nanoribbon

Journal Article · · Nature Communications
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  1. National Univ. of Singapore (Singapore)
  2. Agency for Science, Technology and Research (Singapore)
  3. National Univ. of Singapore (Singapore); Guilin Univ. of Electronic Technology, Guilin (China)
  4. Jiangsu Normal Univ., Jiangsu Sheng (China)
  5. Harbin Inst. of Technology, Heilongjiang Sheng (China)
  6. Beihang Univ., Beijing (China)
  7. National Univ. of Singapore (Singapore). Singapore Synchrotron Light Sources (SSLS)
  8. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  9. Agency for Science, Technology and Research, Singapore (Singapore). Inst. of High Performance Computing

Achieving a functional and durable non-platinum group metal-based methanol oxidation catalyst is critical for a cost-effective direct methanol fuel cell. While Ni(OH)2 has been widely studied as methanol oxidation catalyst, the initial process of oxidizing Ni(OH)2 to NiOOH requires a high potential of 1.35 V vs. RHE. Such potential would be impractical since the theoretical potential of the cathodic oxygen reduction reaction is at 1.23 V. Here we show that a four-coordinated nickel atom is able to form charge-transfer orbitals through delocalization of electrons near the Fermi energy level. As such, our previously reported periodically arranged four-six-coordinated nickel hydroxide nanoribbon structure (NR-Ni(OH)2) is able to show remarkable methanol oxidation activity with an onset potential of 0.55 V vs. RHE and suggests the operability in direct methanol fuel cell configuration. Thus, this strategy offers a gateway towards the development of high performance and durable non-platinum direct methanol fuel cell.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1668648
Report Number(s):
BNL-219873-2020-JAAM
Journal Information:
Nature Communications, Vol. 11, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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