HEA-Functionalized SnO2 Sensor

High H2 selectivity

Leverages synergistic catalytic and electronic effects of the HEA to drastically boost hydrogen selectivity while retaining ultralow detection limit.

Xueyang, Li · Xueqing, Jiang · Zheng, Xudong · Lei, Jianfei · Xinxin, Wang · Huafei, Geng · Zhenjie, Zhao · Li, Gaojie

International Journal of Hydrogen Energy 2026

Specifications

Response

{'zh': '1961.5', 'en': '1961.5'}

Detection limit

{'zh': '20', 'en': '20'} ppb

Advantages

Ultrahigh response

Response of 1961.5 toward 200 ppm H2, far exceeding conventional SnO2 sensors.

Ultralow detection limit

Detection limit as low as 20 ppb, enabling trace-level hydrogen detection.

Excellent selectivity

Exhibits excellent selectivity toward hydrogen over other gases.

Rapid response

Fast response to hydrogen, beneficial for real-time monitoring.

Applications

• Hydrogen safety monitoring：Detects leaks in hydrogen fuel systems to prevent explosion hazards.
• Highly selective gas sensing：Accurately identifies hydrogen in gas mixtures, avoiding false alarms.
• Environmental gas detection：Monitors trace hydrogen in the environment to ensure air quality.