Supplementary Data for

Rh Supported on LaPO4/SiO2 Nanocomposites as Thermally Stable Catalysts for TWC Applications

Haris Puspito Buwono, Saki Minami, Taishi Eidome, Satoshi Hinokuma,

Yuki Nagao, Yunosuke Nakahara, Masato Machida

a Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University 2-39-1 Kurokami, Chuo, Kumamoto 860-8555 Japan

b Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University

1-30 Goryo-Ohara, Nishikyo, Kyoto 615-8245, Japan

c Catalysts Strategic Division, Engineered Materials Sector, Mitsui Mining & Smelting Co., Ltd., 1013-1 Ageoshimo, Ageo, Saitama 362-0025 Japan

Table of Contents

Figure S1. Light-off curves for NO-CO-C3H6-O2 reaction over 0.4 wt% Rh supported on LaPO4 and its composites before and after thermal aging at 900 °C.

Figure S2. Powder X-ray diffraction patterns of LaPO4/SiO2 composites after calcination at 900 °C in air.

Table S1. Reaction conditions for TWC elementary reactions.

Figure S1. Light-off curves for NO-CO-C3H6-O2 reaction over 0.4 wt% Rh supported on LaPO4 and its composites before (solid lines) and after thermal aging (dashed lines) at 900 °C. NO (0.050%), CO (0.510%), C3H6 (0.039%), O2 (0.400%), and He (balance), W/F = 5.0 × 10−4 g min cm−3, heating rate: 10 °C min−1.


Figure S2. Powder X-ray diffraction patterns of LaPO4/SiO2 composites after calcination at 900 °C in air. (a) 10 mol%, (b) 20 mol%, (c) 30 mol%, (d) 40 mol% LaPO4/SiO2 and (e) LaPO4.

Table S1. Reaction conditions for TWC elementary reactions

CO-O2 / CO-NO / CO-H2O / C3H6-H2O / C3H6-O2 / NO-C3H6-O2 / NO-C3H6 / NO-H2
A/F a / 20.1 / 14.6 / 12.8 / 12.8 / 15.1 / 14.6 / 13.3 / 14.2
l b / 20.0 / 1.0 / - / - / 2.2 / 1.0 / 0.14 / 0.5
CO (%) / 0.10 / 0.10 / 0.10 / - / - / - / -
C3H6 (%) / - / - / - / 0.04 / 0.05 / 0.04 / 0.04 / -
H2 (%) / - / - / - / - / - / - / - / 0.10
NO (%) / - / 0.10 / - / - / 0.05 / 0.05 / 0.05
O2 (%) / 1.0 / - / - / 0.50 / 0.15 / - / -
H2O (%) / - / - / 10 / 10 / - / - / - / -

W/F = 5.0×10−4 g min cm−3.

a Air-to-fuel weight ratio calculated from concentrations of each gas in the gas feed.

b Oxygen excess ratio defined as l = (pNO + 2 pO2)/(9 pC3H6 + pCO).