Investigating the Role of Undercoordinated Pt Sites at the Surface of Layered PtTe for Methanol Decomposition

Overview

Journal Nat Commun

Specialty Biology

Date 2024 Jan 22

PMID 38253575

Authors

Jing-Wen Hsueh

Lai-Hsiang Kuo

Po-Han Chen

Wan-Hsin Chen

Chi-Yao Chuang

Chia-Nung Kuo

Chin-Shan Lue

Yu-Ling Lai

Bo-Hong Liu

Chia-Hsin Wang

Yao-Jane Hsu

Chun-Liang Lin

Jyh-Pin Chou

Meng-Fan Luo

Affiliations

Soon will be listed here.

Abstract

Transition metal dichalcogenides, by virtue of their two-dimensional structures, could provide the largest active surface for reactions with minimal materials consumed, which has long been pursued in the design of ideal catalysts. Nevertheless, their structurally perfect basal planes are typically inert; their surface defects, such as under-coordinated atoms at the surfaces or edges, can instead serve as catalytically active centers. Here we show a reaction probability > 90 % for adsorbed methanol (CHOH) on under-coordinated Pt sites at surface Te vacancies, produced with Ar bombardment, on layered PtTe - approximately 60 % of the methanol decompose to surface intermediates CHO (x = 2, 3) and 35 % to CH (x = 1, 2), and an ultimate production of gaseous molecular hydrogen, methane, water and formaldehyde. The characteristic reactivity is attributed to both the triangular positioning and varied degrees of oxidation of the under-coordinated Pt at Te vacancies.

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