Vacancy rich TiB2 nanosheets promote electrochemical ammonia synthesis

Show simple item record

dc.contributor.author Rasyotra, Anshul
dc.contributor.author Thakur, Anupma
dc.contributor.author Gaykwad, Bhagyashri
dc.contributor.author Mandalia, Raviraj
dc.contributor.author Ranganathan, Raghavan
dc.contributor.author Jasuja, Kabeer
dc.coverage.spatial United States of America
dc.date.accessioned 2024-05-10T15:36:08Z
dc.date.available 2024-05-10T15:36:08Z
dc.date.issued 2024-05
dc.identifier.citation Rasyotra, Anshul; Thakur, Anupma; Gaykwad, Bhagyashri; Mandalia, Raviraj; Ranganathan, Raghavan and Jasuja, Kabeer, "Vacancy rich TiB2 nanosheets promote electrochemical ammonia synthesis", ACS Applied Materials & Interfaces, DOI: 10.1021/acsami.4c00253, May 2024.
dc.identifier.issn 1944-8244
dc.identifier.issn 1944-8252
dc.identifier.uri https://doi.org/10.1021/acsami.4c00253
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/10024
dc.description.abstract The ability to exfoliate transition metal diborides has led to a renewed interest in their prospect to be applied as catalysts for electrochemical reactions. This is due to an enhanced access to the unprecedented interfaces these nanomaterials offer. In this work, we show that nanosheets exfoliated from TiB2 exhibit vacancies that facilitate an excellent interface for catalyzing nitrogen reduction reaction (NRR). We found that these nanosheets demonstrate a high selectivity toward NH3 because of their abiity to preferentially chemisorb and activate N2. These nanosheets exhibit a superlative NH3 yield of 318 μg h–1 cm–2 at −0.2 V versus RHE with a faradaic efficiency of 57%. We also found how the relative ratios of Ti and B atoms in these nanosheets can affect the NH3 yield and faradaic efficiency. We supplement these results with DFT studies that indicate that it is the creation of frustrated Lewis pairs along with the Ti–B synergy that induces a push-and-pull effect; this in turn favors N2 activation and lowers the energy barrier for NRR. Furthermore, we explored B-exposed and Ti-exposed surfaces to understand how different surfaces affect the reaction yield and efficiency and found that Ti-exposed surfaces with boron divacancy have the highest propensity for NRR. The maiden insights presented in this study on the role of transition metal–boron synergy and interfaces present significant additions to the fast-expanding knowledge on nanoscaled metal borides.
dc.description.statementofresponsibility by Anshul Rasyotra, Anupma Thakur, Bhagyashri Gaykwad, Raviraj Mandalia, Raghavan Ranganathan and Kabeer Jasuja
dc.language.iso en_US
dc.publisher American Chemical Society
dc.subject Metal diborides
dc.subject Xbenes
dc.subject Electrochemical nitrogen reduction reaction
dc.subject Frustrated Lewis pairs
dc.subject Vacancy
dc.subject Nitrogen chemisorption
dc.subject Ammonia electrosynthesis
dc.subject Titanium diboride
dc.title Vacancy rich TiB2 nanosheets promote electrochemical ammonia synthesis
dc.type Article
dc.relation.journal ACS Applied Materials & Interfaces


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Digital Repository


Browse

My Account