---
res:
  bibo_abstract:
  - Production of hydrogen at large scale requires development of non-noble, inexpensive,
    and high-performing catalysts for constructing water-splitting devices. Herein,
    we report the synthesis of Zn-doped NiO heterostructure (ZnNiO) catalysts at room
    temperature via a coprecipitation method followed by drying (at 80 °C, 6 h) and
    calcination at an elevated temperature of 400 °C for 5 h under three distinct
    conditions, namely, air, N2, and vacuum. The vacuum-synthesized catalyst demonstrates
    a low overpotential of 88 mV at −10 mA cm–2 and a small Tafel slope of 73 mV dec–1
    suggesting relatively higher charge transfer kinetics for hydrogen evolution reactions
    (HER) compared with the specimens synthesized under N2 or O2 atmosphere. It also
    demonstrates an oxygen evolution (OER) overpotential of 260 mV at 10 mA cm–2 with
    a low Tafel slope of 63 mV dec–1. In a full-cell water-splitting device, the vacuum-synthesized
    ZnNiO heterostructure demonstrates a cell voltage of 1.94 V at 50 mA cm–2 and
    shows remarkable stability over 24 h at a high current density of 100 mA cm–2.
    It is also demonstrated in this study that Zn-doping, surface, and interface engineering
    in transition-metal oxides play a crucial role in efficient electrocatalytic water
    splitting. Also, the results obtained from density functional theory (DFT + U
    = 0–8 eV), where U is the on-site Coulomb repulsion parameter also known as Hubbard
    U, based electronic structure calculations confirm that Zn doping constructively
    modifies the electronic structure, in both the valence band and the conduction
    band, and found to be suitable in tailoring the carrier’s effective masses of
    electrons and holes. The decrease in electron’s effective masses together with
    large differences between the effective masses of electrons and holes is noticed,
    which is found to be mainly responsible for achieving the best water-splitting
    performance from a 9% Zn-doped NiO sample prepared under vacuum.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Gundegowda Kalligowdanadoddi
      foaf_name: Kiran, Gundegowda Kalligowdanadoddi
      foaf_surname: Kiran
  - foaf_Person:
      foaf_givenName: Saurabh
      foaf_name: Singh, Saurabh
      foaf_surname: Singh
      foaf_workInfoHomepage: http://www.librecat.org/personId=12d625da-9cb3-11ed-9667-af09d37d3f0a
    orcid: 0000-0003-2209-5269
  - foaf_Person:
      foaf_givenName: Neelima
      foaf_name: Mahato, Neelima
      foaf_surname: Mahato
  - foaf_Person:
      foaf_givenName: Thupakula Venkata Madhukar
      foaf_name: Sreekanth, Thupakula Venkata Madhukar
      foaf_surname: Sreekanth
  - foaf_Person:
      foaf_givenName: Gowra Raghupathy
      foaf_name: Dillip, Gowra Raghupathy
      foaf_surname: Dillip
  - foaf_Person:
      foaf_givenName: Kisoo
      foaf_name: Yoo, Kisoo
      foaf_surname: Yoo
  - foaf_Person:
      foaf_givenName: Jonghoon
      foaf_name: Kim, Jonghoon
      foaf_surname: Kim
  bibo_doi: 10.1021/acsaem.3c02519
  bibo_issue: '1'
  bibo_volume: 7
  dct_date: 2024^xs_gYear
  dct_identifier:
  - UT:001138342900001
  dct_isPartOf:
  - http://id.crossref.org/issn/2574-0962
  dct_language: eng
  dct_publisher: American Chemical Society@
  dct_subject:
  - Electrical and Electronic Engineering
  - Materials Chemistry
  - Electrochemistry
  - Energy Engineering and Power Technology
  - Chemical Engineering (miscellaneous)
  dct_title: Interface engineering modulation combined with electronic structure modification
    of Zn-doped NiO heterostructure for efficient water-splitting activity@
...