In situ oxygen vacancy formation at the metal/TiO2 interface during ammonia borane hydrolysis: a study of CuCo nanoparticles supported on various colored TiO2 samples

Dinabandhu Patra; Reeya Garg; Ankita Singh; Ujjal K. Gautam; Ramakrishnan Ganesan; Balaji Gopalan

doi:10.1039/D4NJ03542A

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In situ oxygen vacancy formation at the metal/TiO₂ interface during ammonia borane hydrolysis: a study of CuCo nanoparticles supported on various colored TiO₂ samples†

Dinabandhu Patra,^a Reeya Garg,^b Ankita Singh,^a Ujjal K. Gautam,^b Ramakrishnan Ganesan

*^a and Balaji Gopalan

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, Birla Institute of Technology and Science – Pilani Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad – 500 078, India
E-mail: ram.ganesan@hyderabad.bits-pilani.ac.in, gbalaji@hyderabad.bits-pilani.ac.in

^b Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) – Mohali, SAS Nagar, Mohali, Punjab – 140306, India

Abstract

The effects of in situ generated interfacial oxygen vacancies on the catalytic efficiency of copper–cobalt (CuCo) supported on colored TiO₂ nanoparticles were studied. These catalysts were synthesized via a solid-state approach and tested for their hydrogen generation efficacy during ammonia borane (AB) hydrolysis. The formation of in situ oxygen vacancies at the metal–TiO₂ interface is proposed. The in situ oxygen vacancies were studied by analyzing the rutile Raman band at 440 cm⁻¹, and the change in the intensity of the Raman band was related to the concentration of the generated oxygen vacancies. We conclude that white TiO₂ serves as a better support than reduced colored TiO₂.

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DOI: https://doi.org/10.1039/D4NJ03542A
Article type: Paper
Submitted: 08 Aug 2024
Accepted: 03 Jan 2025
First published: 06 Jan 2025
This article is Open Access

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New J. Chem., 2025,49, 1982-1993

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In situ oxygen vacancy formation at the metal/TiO₂ interface during ammonia borane hydrolysis: a study of CuCo nanoparticles supported on various colored TiO₂ samples

D. Patra, R. Garg, A. Singh, U. K. Gautam, R. Ganesan and B. Gopalan, New J. Chem., 2025, 49, 1982 DOI: 10.1039/D4NJ03542A

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