This paper reviews recent progresses of four hydrogen sensors: electrochemical type,semiconductor type,thermo-electrical type and optical type sensor as well as related materials;and mainly discusses the mechanisms and methods of improving properties of hydrogen sensitive materials.

Introduced were the research progresses of three main hydrogen sensitive materials, including electrochemical type, semiconductor type and optical type sensitive materials, which were worded in different mechanisms.

Among the various hydrogen leak detection methods,the way to detect hydrogen with hydrogen inducing color change materials shows its intrinsic safety property.

Development of Fe_2O_3 gas-sensing material;

Study on catalytic property and gas sensing mechanism of indium oxide-based gas-sensing materials;

Preparation of ZnO gas-sensing material by nucleation/crystallization separation method

Application of recent test technology in gas sensing materials;

Progress in semiconductor complex oxides gas sensing materials;

The preparation methods and influencing factors of intrinsically conducting polymers(ICPs) as gas sensing materials were reviewed.

Preparing nanometer gas sensitive materials with microemulsion reactor is a new method for nanometer materials.

In this paper,we developed a new method to test the dynamic characteristics of gas sensitive materials, and could get unique curve for differ.

A new novel organic gas sensitive materials,substituted rare earth double phthalocyanine,has better performance of dissolving and film forming,has been preparated in this paper.