Wood vessel in natural wood (NW) as the channel for water and inorganic salt transport has a natural aligned microchannel structure and a great hydrophily. In the present work, NW was used as catalyst support which was directly impregnated in Co(NO₃)₂ solution and then calcined in N₂ atmosphere to prepare a catalyst (denoted as Co/NWBC-OS), which was called a one-step calcination method. For comparison, NW biochar (NWBC) derived from pyrolytic NW was also impregnated in Co(NO₃)₂ solution and calcined in N₂ atmosphere to prepare catalyst (denoted as Co/NWBC-TS), which was called a two-step calcination method. Characterization results reveal that NW possesses a greater hydrophily and wettability than NWBC, which is beneficial to impregnation process resulting in a better active components dispersion. In the meanwhile, Co/NWBC-OS has a higher Co³⁺/Co²⁺ ratio and more surface chemisorbed oxygen. The higher Co³⁺/Co²⁺ ratio can generate more oxygen vacancies which can capture and activate gaseous oxygen to form more surface chemisorbed oxygen. Surface chemisorbed oxygen as the main active site can greatly promote Hg⁰ removal performance. These results lead to an excellent Hg⁰ removal efficiency of Co/NWBC-OS which is 99% at 180 °C. Additionally, O₂ and NO can promote the Hg⁰ removal process whereas H₂O, SO₂ and NH₃ exert an obviously prohibited effect on Hg⁰ removal performance.

以天然木材（NW）为水和无机盐运输通道的木材容器具有自然排列的微通道结构和很大的疏水性。在本工作中，将NW用作催化剂载体，将其直接浸渍在Co（NO ₃）₂溶液中，然后在N ₂气氛中煅烧以制备催化剂（称为Co / NWBC-OS），称为单催化剂。分步煅烧法。为了进行比较，还将热解NW衍生的NW生物炭（NWBC）浸渍在Co（NO ₃）₂溶液中并在N _2中煅烧在大气中制备催化剂（称为Co / NWBC-TS），称为两步煅烧法。表征结果表明，NW比NWBC具有更大的亲水性和润湿性，这有利于浸渍过程，从而导致更好的活性成分分散。同时，Co / NWBC-OS具有较高的Co ³⁺ / Co ²⁺比和更多的表面化学吸附氧。较高的Co ³⁺ / Co ²⁺比可以产生更多的氧空位，这些空位可以捕获并活化气态氧，从而形成更多的表面化学吸附的氧。表面化学吸附的氧作为主要活性位点可以大大促进Hg ^0的去除性能。这些结果导致极好的汞⁰Co / NWBC-OS的去除效率在180°C时为99％。另外，O ₂和NO可以促进Hg ^0的去除过程，而H ₂ O，SO ₂和NH ₃对Hg ^0的去除性能具有明显的抑制作用。