Pd/C-Based Sensor for Gas Sensing in Transformer Oil

The detection of dissolved gas in transformer oil is of vital importance to diagnose the early fault and monitor the security and stability of power systems. In this work, distinct Pd/C, Pd/C-R and Pd/NC were synthesized and evaluated. XRD and XPS characterizations show that both Pd-0 and Pd-II are presented over the surface of carbon host for Pd/C, while poor gas-sensitive properties were presented for Pd-0 in H-2-reduced Pd/C-R sample. High content of cationic Pd-II species are synthesized by nitrogen doping of the carbon surface for Pd/NC. The experimental results showed that the gas-sensitive performances of H-2/CO/C2H2 gases is facilitated over the developed Pd/NC material. This study can provide reference for the rapid detection and fault diagnosis of faulty gases in transformers.