Ultra-Low-Loaded Platinum Bonded Hexagonal Boron Nitride as Stable Electrocatalyst for Hydrogen Generation

Sadhukhan, Rayantan ; Kumar, Amar ; Prasanna, Ponnappa K. ; Guha, Anku ; Arenal, Raul ; Chakraborty, Sudip ; Narayanan, Tharangattu N.

Resumen: Chemical stability of hexagonal boron nitride (hBN) ultrathin layers in harsh electrolytes and the availability of nitrogen site in hBN to stabilize metals like Pt are used here to develop a high intrinsic activity hydrogen evolution reaction (HER) catalyst having low loaded Pt (5 weight% or <1 atomic%). A catalyst having a nonzero oxidation state for Pt (with a Pt–N bonding) is shown to be HER active even with low catalyst loadings (0.114 mgcm–2). Electronic modification of the shear exfoliated hBN sheets is achieved by Au nanoparticle-based surface decoration (hBN_Au), and further anchoring with Pt develops a catalyst (hBN_Au_Pt) with high turnover frequency for HER (∼15). The hBN_Au_Pt is shown to be a highly durable catalyst even after the accelerated durability test for 10000 cycles and temperature annealing at 100 °C. Density functional theory based calculations gave insights in to the electronic modifications of hBN with Au and the catalytic activity of the hBN_Au_Pt system, in line with the experimental studies, indicating the demonstration of a new class of catalyst system devoid of issues such as carbon corrosion and Pt leaching.

Idioma: Inglés

DOI: 10.1021/acsami.3c15296

Año: 2024

Publicado en: ACS applied materials & interfaces 16, 7 (2024), 8627-8638
ISSN: 1944-8244

Factor impacto JCR: 8.2 (2024)

Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 31 / 147 = 0.211 (2024) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 83 / 461 = 0.18 (2024) - Q1 - T1

Factor impacto CITESCORE: 14.5 - Materials Science (all) (Q1)

Factor impacto SCIMAGO: 1.921 - Materials Science (miscellaneous) (Q1) - Nanoscience and Nanotechnology (Q1) - Medicine (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-23R
Financiación: info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3
Financiación: info:eu-repo/grantAgreement/EC/H2020/881603/EU/Graphene Flagship Core Project 3/GrapheneCore3
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-104739GB-I00

Tipo y forma: Artículo (Versión definitiva)