Bifunctional and Non-Noble Cobalt-Boride Electrocatalyst for Overall Alkaline Seawater Electrolysis

Vernekar, Yashashree; Bhide, Aniruddha; Gupta, Suraj; Patel, N.; Fernandes, R.

doi:10.2139/ssrn.4360517

Cited by 3 publications

(2 citation statements)

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“…With the energy crisis worsening and environmental pollution reaching critical levels, the imperative to harness renewable and eco‐friendly energy for societal progress has become paramount [1–4] . However, the intermittent nature of renewable sources such as solar and wind energy poses challenges for sustained utilization [5–7] .…”

Section: Introductionmentioning

confidence: 99%

“…With the energy crisis worsening and environmental pollution reaching critical levels, the imperative to harness renewable and eco-friendly energy for societal progress has become paramount. [1][2][3][4] However, the intermittent nature of renewable sources such as solar and wind energy poses challenges for sustained utilization. [5][6][7] To address this, converting renewable energy into hydrogen for storage offers a highly efficient solution towards achieving a hydrogen-based economy.…”

Section: Introductionmentioning

confidence: 99%

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Interfacial Coupling of Graphene with Nickel Nanoparticles for Water Splitting and Urea Oxidation: A Spectroelectrochemical Investigation

Saha

Das

2023

ChemPhysChem

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Nickel nanoparticle and graphene interfaces of various stoichiometries were created through electrodeposition techniques. The catalytic behavior of the electrodeposited films was investigated through spectro‐electrochemical methodologies. UV‐vis absorbance spectra of the electrodeposited films are significantly different in the air and alkaline medium. Furthermore, UV‐vis and Raman spectroscopy confirmed the coupling of Ni nanoparticles (Ni‐NP) with the graphene framework, along with NiO and Ni(OH)2. A combination of Raman and impedance spectroscopy revealed that the surface adsorption and charge transfer properties of the electrodeposited films are entirely dependent on the defects on graphene structure as well as distribution of Ni‐NP on graphene. The electrodeposited films possess heterogeneous catalytic properties with a low overpotential of 50 mV (10 mA/cm‐2) for hydrogen evolution reaction, as well as 601 mV and 391 mV (at 50 mA/cm‐2) for the oxygen evolution reaction and urea oxidation reaction, respectively. In addition, eelectrodeposited samples show extraordinary overall water splitting performance by achieving a current density of 10 mA/cm2 at a very small applied potential of 1.38 V. This synergistic coupling of Ni and graphene renders the electrodeposited samples promising candidates as electrodes for overall water splitting in alkaline and urea‐supplemented solutions.

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Section: Introductionmentioning

confidence: 99%