temperature-programmed reduction (n.)

in thermal analysis
initialism: TPR
https://doi.org/10.1351/goldbook.12312
Experiment using a reducing atmosphere, usually hydrogen. Reduction is monitored by any appropriate technique (EGA, TGA, gas sorption, etc.).
Source:
PAC, 2014, 86, 545. (ICTAC nomenclature of thermal analysis (IUPAC Recommendations 2014)) on page 549 [Terms] [Paper]