Electrochemically active novel amorphous carbon (a-C)/Cu3P peapod nanowires by low-temperature chemical vapor phosphorization reaction as high efficient electrocatalysts for hydrogen evolution reaction

Arumugam Manikandan, Pavithra Sriram, Kun Chieh Hsu, Yi Chung Wang, Chia Wei Chen, Yu Chuan Shih, Ta Jen Yen, Horng Tay Jeng, Hao Chung Kuo, Yu Lun Chueh*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Toward finding low-cost electrocatalysts with high catalytic properties to replace noble metals as high efficient electrocatalysts in electrochemical hydrogen evolution reaction (HER) of total water splitting plays a vital role to approach the green and sustainable energy supply. Here, we demonstrate the direct growth of novel copper phosphide coated with amorphous carbon, namely heterostructured a-C/Cu3P peapod nanowires from chemically synthesized copper nanowires (Cu NWs) followed by a chemical vapor phosphorization reaction (CVPR) process at a low temperature of 400 °C. The heterostructured a-C/Cu3P peapod nanowires exhibit a superior electrocatalytic activity by a lower overpotential of 287 mV at a current density of 10 mA cm−2 with a low Tafel slope of 72 mV dec−1 and excellent stability over 1000 cycles. The superior electrocatalytic performance can be explained by the superior contact of the electrolyte with active sites on the heterostructured a-C/Cu3P due to the high surface area of peapod nanowire structure covered by defective edges of graphene with the encapsulated amorphous carbon layer, which can tremendously enhance electrical conductivity at the surface.

Original languageEnglish
Pages (from-to)374-383
Number of pages10
JournalElectrochimica Acta
Volume318
DOIs
StatePublished - 20 Sep 2019

Keywords

  • And nanotube
  • Chemical vapor phosphorization reaction
  • Copper phosphide
  • HER
  • Peapod nanowire

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