Khan, Noureen Amir Rahman, Gul Chae, Sang Youn Yoon, Noyoung Shah, Anwar ul Haq Ali Mian, Shabeer Ahmad 2024-05-30T10:00:04Z 2024-05-30T10:00:04Z 2024-05-30 2024-06 https://pubs.kist.re.kr/handle/201004/149969 Nickel ferrites (NiFe2O4) having rich redox chemistry are regarded as proficient electrocatalysts for sustainable and renewable energy applications. However, its entire potential as an electrode material is limited by its weak structural characteristics and inadequate charge transport qualities. This work reports a series of zinc-substituted inverse spinel ferrites (Zn-x Ni1-x Fe2O4) synthesized by a simple and environmentally benign hydrothermal method as electrocatalysts for overall water splitting. The surface morphology, structural elements, and electronic properties of resultant materials are significantly changed by Zn inclusion. Among different compositions, the ferrite sample Zn0.5Ni0.5Fe2O4 showed outstanding water splitting performances, with a current density of 100 mA<middle dot>cm(-2) for OER and HER at the cost of 290 mV and 311 mV overpotentials, respectively. The electrode demonstrated lower Tafel slopes of 56 and 46 mV<middle dot>dec-1 for HER and OER with a high turnover frequency (TOF) and exchange current density (j 0). Significantly, this electrode demanded a cell voltage of 1.48 V in a two-electrode electrolyzer to deliver 10 mA<middle dot>cm(-2) and showed good stability for 24 h. This is attributed to the efficient charge transport properties of the Zn-incorporated NiFe2O4 with high electrical conductivity and charge transfer characteristics. Overall, the findings highlighted the potential of Zn-incorporated NiFe2O4 as a promising electrocatalyst for renewable hydrogen production. English AMER CHEMICAL SOC Unraveling the Electrocatalytic Response of Zn-Substituted Nickel Ferrite for Overall Water Splitting Article 10.1021/acsaem.4c00810 1 ACS Applied Energy Materials, v.7, no.11, pp.4960 - 4974 ACS Applied Energy Materials 7 11 4960 4974 N scie scopus 001228011400001 2-s2.0-85193683964 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article HYDROGEN EVOLUTION EFFICIENT OXIDE CATALYST PERFORMANCE OXIDATION SPECTRA FILMS ARRAY SIZE nickel ferrite zinc hydrogen evolution reaction oxygen evolution reaction water splitting