The catalytic partial oxidation of methane is evaluated over a Rh (2–15 mol%)-doped Sr0.92Y0.08TiO3-δ (SYT) perovskite-based catalyst prepared by the Pechini method for fuel-cell applications. The Rh dopant replaces titanium in the SYT catalyst, resulting in a catalyst with excellent and stable catalytic performance during thermal cycling in the temperature range 600–900 °C and in long-term stability tests at 750 °C for 130 h, without deactivation due to carbon coking or sintering. A systematic round-robin characterization is carried out by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and CO chemisorption to establish the chemical and physical properties of the catalyst. Adding Rh as a dopant in the catalyst significantly promotes the catalytic activity due to the presence of exsoluted rhodium particles on the catalyst surface. Small particles (2–5 nm) of Rh on the SYT surface are observed to be evenly dispersed, without agglomeration, and the turnover frequency (TOF) of the POM reaction increased. In the long-term stability tests, catalysts are tested in direct internal reforming at an SOFC anode, achieving high methane conversion (∼99%) in both dry and wet conditions.
Bibliographical noteFunding Information:
Dr. Grazia Accardo was also supported by KRF – Korea Research Fellowship through the National Research Foundation of Korea and funded by the Ministry of Science, ICT and Future Planning of Republic of Korea (Grant Number 2016H1D3A1908428 ).
This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), funded by the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20153030040930 ).
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering