Publications by authors named "Adit Kumar Shah"

3 Publications

  • Page 1 of 1

Step-Scheme Heterojunction between CdS Nanowires and Facet-Selective Assembly of MnO-BiVO for an Efficient Visible-Light-Driven Overall Water Splitting.

ACS Appl Mater Interfaces 2021 Sep 14. Epub 2021 Sep 14.

Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.

The spatial separation and transport of photogenerated charge carriers is crucial in building an efficient photocatalyst for solar energy conversion into chemical energy. A step-scheme CdS/MnO-BiVO photocatalyst was synthesized by spatial deposition of MnO and one-dimensional (1D) CdS nanowires on a three-dimensional (3D) decahedron BiVO surface. The photocatalytic activity of CdS/MnO-BiVO for the overall water-splitting reaction was investigated without sacrificial reagent under visible light irradiation. The synthesized photocatalysts were thoroughly analyzed using high-end characterization techniques. The 5CdS/MnO-BiVO exhibited the highest H and O production rates of 1.01 and 0.51 mmol g h, respectively, with an apparent quantum yield of 11.3% in the absence of any sacrificial reagent. The excellent photoactivity is due to the presence of oxygen vacancies along with effective charge separation/transfer properties and strong interaction of cocatalysts (MnO and Pt) with the photocatalysts (BiVO and CdS) in the 5CdS/MnO-BiVO heterojunction. The significance of the presence of MnO and Pt cocatalysts on the selective facets of BiVO for efficient overall water splitting reaction is highlighted in this work.
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http://dx.doi.org/10.1021/acsami.1c11740DOI Listing
September 2021

Hollow cuboidal MnCoO coupled with nickel phosphate: a promising oxygen evolution reaction electrocatalyst.

Chem Commun (Camb) 2021 Aug;57(65):8027-8030

Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India.

The growth of hierarchical morphologies of complex metal oxides directly on the substrate is a challenging task. Herein we report a unique hollow-cuboidal MnCo2O4 (h-MCO) morphology that offers insights into the efficient charge-transfer and surface kinetics for the oxygen evolution reaction. h-MCO coupled nickel phosphate under alkaline conditions outperforms the benchmark RuO2.
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http://dx.doi.org/10.1039/d1cc02383gDOI Listing
August 2021

Effect of surface overlayer in enhancing the photoelectrochemical water oxidation of in situ grown one-dimensional spinel zinc ferrite nanorods directly onto the substrate.

Chem Commun (Camb) 2018 Sep;54(74):10483-10486

Department of Chemistry, Indian Institute Technology, Guwahati - 781039, Assam, India.

Overlayer passivation minimizes surface defects and arrests the back transfer of electrons for an enhanced charge extraction. Surface passivation of ZnFe2O4 using alumina yields enhanced charge carrier density from 8.43 × 1020 cm-3 to 18.83 × 1020 cm-3 giving a record efficiency in this class of compounds.
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http://dx.doi.org/10.1039/c8cc04882gDOI Listing
September 2018
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