当前位置:首页>南京>贵州大学袁继理、南京大学李朝升团队Angewandte!!新型双路径光固氮催化剂问世!Ru 基多活性位点实现硝酸盐高效合成

贵州大学袁继理、南京大学李朝升团队Angewandte!!新型双路径光固氮催化剂问世!Ru 基多活性位点实现硝酸盐高效合成

  • 2026-06-08 05:30:39
贵州大学袁继理、南京大学李朝升团队Angewandte!!新型双路径光固氮催化剂问世!Ru 基多活性位点实现硝酸盐高效合成

材料研究前沿——聚焦材料科学研究前沿进展。100多万材料领域硕博教师们订阅的微信大号。点击标题下蓝字“材料研究前沿”关注,我们将为您提供有价值、最前沿的材料研究资讯。

人工固氮是维系全球化工与农业生产的核心技术,现阶段工业制备硝酸盐主要依赖哈伯 - 博施法与奥斯特瓦尔德法,两类工艺需严苛的高温高压条件,不仅消耗大量化石能源,还会排放大量二氧化碳,生态与能源成本居高不下。太阳能驱动的光催化氮氧化反应可在常温常压下,直接利用氮气、氧气和水合成硝酸盐,成为替代传统高能耗工业路线的理想技术。但该技术实际应用仍面临多重瓶颈,氮气分子具备极强的热力学稳定性,其三键键能高达 941 kJ/mol,氧化反应活化能垒达到 87.7 kJ/mol。同时,光生电荷载流子利用率偏低、活性氧物种生成效率不足且反应竞争路径复杂,进一步制约催化效率。此外,羟基自由基等关键活性物种寿命短、扩散范围有限,难以与活化后的氮气分子充分反应,现有催化材料无法精准调控活性位点布局与反应路径,亟需开发新型协同催化体系破解行业痛点。

在这项研究中,研究人员联合设计并制备出锚定于介孔氮化碳的 Ru₁-Ru-RuO₂@CN 复合光催化剂,构建了 Ru/RuO₂纳米岛与卫星状 Ru-N₄单原子位点协同的特殊结构。该催化剂凭借多活性位点的分工协作,实现光生电子与空穴的高效分离利用,Ru-N₄位点和 Ru 纳米颗粒捕获光生电子活化氮气与氧气,生成关键反应中间体,RuO₂纳米颗粒则富集光生空穴,加速界面水分子解离并生成羟基自由基。测试数据显示,该催化剂硝酸盐产率可达 14.34 mg g⁻¹ h⁻¹,420 nm 波长下表观量子产率为 5.2%。研究团队借助同位素标记、原位光谱等多种表征手段,完整厘清硝酸盐生成的双反应路径,一是羟基自由基直接氧化中间体生成硝酸盐,二是中间体先被氧气氧化为二氧化氮再自发转化为硝酸盐,且富氧环境下第二条路径占据主导。同时材料具备优异稳定性,可见光下连续反应 50 小时仍能保持高效催化性能,为光固氮催化剂结构设计提供了全新思路。

本研究通过整合 Ru-N₄单原子、Ru 及 RuO₂纳米颗粒,在介孔氮化碳载体上构筑出空间分布合理的多活性协同催化体系,有效解决了光催化氮氧化过程中电荷利用率低、氮气活化困难、活性物种匹配性差等核心问题。超快光谱与原位表征结果证实,不同 Ru 基活性位点形成功能互补的电荷转移体系,大幅提升光子向活性氧物种的转化效率,同时限域局部反应环境,强化氮气与活性物种的相互作用。机理层面明确了两条并行的硝酸盐生成路径,阐明了富氧条件下主导反应路径的演化规律,填补了光催化氮氧化反应机理研究的部分空白。催化剂不仅拥有优异的催化活性与长周期循环稳定性,负载于碳纤维膜后还可在自然阳光条件下实现规模化硝酸盐生产,展现出良好的实际应用潜力。该研究建立了多活性位点协同设计的可行策略,也为拓展钌基催化材料在清洁能源转化、绿色固氮工业领域的应用奠定了理论与实验基础。

评审过300+份本子后,我揭秘锂电正极立项依据的“必杀技”:拒绝罗列,死磕机制!

工材口国自然基金面上项目青年项目申报书参考范文

基于高熵金属氧化物的析氢析氧反应电催化剂 设计及多元活性位点协同效应研究

基于缺陷工程的多元杂原子掺杂硬碳微观结构优化及储钠性能研究 

基于共轭与杂化策略调控共价有机框架电子离域结构提升锂离子迁移动力学机制研究

基于新型功能单体的凝胶聚合物电解质设计及其钠离子电池界面优化研究 

面向快充锂金属电池的梯度结构石榴石电解质 设计及其界面应力自适应机制研究

非晶氧化物无序局域环境对钌单原子电子结构 的精准调控及其析氧反应路径重构研究

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  1. CONNECT:[ UseTime:0.000897s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001520s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.008892s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004676s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001582s ]
  6. SELECT * FROM `set` [ RunTime:0.000562s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001715s ]
  8. SELECT * FROM `article` WHERE `id` = 573948 LIMIT 1 [ RunTime:0.006761s ]
  9. UPDATE `article` SET `lasttime` = 1783077110 WHERE `id` = 573948 [ RunTime:0.007350s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000695s ]
  11. SELECT * FROM `article` WHERE `id` < 573948 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001771s ]
  12. SELECT * FROM `article` WHERE `id` > 573948 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.026343s ]
  13. SELECT * FROM `article` WHERE `id` < 573948 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.015053s ]
  14. SELECT * FROM `article` WHERE `id` < 573948 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009259s ]
  15. SELECT * FROM `article` WHERE `id` < 573948 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.024252s ]
0.298350s