The research advances have been introduced in nano-Pd-based hydrogen sensing materials based on domestic and overseas literatures.According to the differences of sensing materials and structures

the preparations and sensing property of Pd/Pd alloy film and Pd/Pd alloy nanowirelike hydrogen sensors have been summarized.Meanwhile

the research achievements in Pd-CNTs hydrogen sensors have been also introduced.The status in quo and research trends of nano-Pd based hydrogen sensing materials are also expounded.